user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: what did chadwick identify? 
Knowledge Triplets: Hans Geiger, base.kwebbase.kwtopic.has_sentences, Geiger continued to investigate this phenomenon by studying the interaction of alpha particles from radium with metal reflectors.
The Home Life Of Henry W. Longfellow, book.written_work.subjects, Cambridge
His atomic model was anticipated by Lenard., base.kwebbase.kwsentence.next_sentence, He taught Bragg.
ernest rutherford work related to antoine-henri becquerel, base.kwebbase.kwconnection.sentence, In 1897 Rutherford took up the study of radioactivity, discovered in 1896 by French physicist Becquerel.
This convinced Rutherford that the explanation must lie in the nature of the metal atoms in the foil., base.kwebbase.kwsentence.previous_sentence, Foil made from metals with a large atomic number (such as lead) reflected back even more particles.
Cambridge, travel.travel_destination.tourist_attractions, Pleasurewood Hills
Jupiter, location.hud_county_place.place, Jupiter
Capture of Cambridge, time.event.locations, England
Academic, freebase.type_profile.kind, Description
m.075r0h0, award.award_honor.award_winner, Maurice Goldhaber
Cambridge, sports.sports_team_location.teams, Cambridge United F.C.
Also in 1920, Rutherford speculated that uncharged particles, which were later called neutrons, must also exist in the nucleus., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
James Chadwick, people.person.gender, Male
Cambridge, location.location.events, 1986 Cambridge Film Festival
Rutherford became the first research student to work under English physicist J.J. Thomson at the Cavendish Laboratory., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, location.location.contains, Emmanuel College, Cambridge
Cambridge, location.statistical_region.population, m.0ncvp8b
Cambridge, location.statistical_region.population, m.0k2dy4p
James Chadwick, people.person.education, m.03l6r0c
Foil made from metals with a large atomic number (such as lead) reflected back even more particles., base.kwebbase.kwsentence.next_sentence, This convinced Rutherford that the explanation must lie in the nature of the metal atoms in the foil.
Cambridge, location.statistical_region.population, m.0ncvpc2
Cambridge, location.location.contains, Downing College, Cambridge
Chadwick, common.image.appears_in_topic_gallery, James Chadwick
James Chadwick, people.person.profession, Physicist
Chadwick, astronomy.extraterrestrial_location.type_of_planetographic_feature, Impact crater
Cambridge, location.location.contains, Darwin College, Cambridge
His results were used later in Langevin's development of sonar., base.kwebbase.kwsentence.contains_connections, ernest rutherford work related to sonar
James Chadwick, influence.influence_node.peers, m.09c3cww
Collection of journal articles, book.written_work.author, James Chadwick
James Chadwick, award.award_winner.awards_won, m.0x2g156
Cambridge, location.location.contains, Westcott House, Cambridge
2014 Tour de France, time.event.locations, Cambridge
m.063x7hv, base.nobelprizes.nobel_subject_area.nobel_awards, Neutron
World War I, time.event.locations, Europe
Cambridge, location.statistical_region.population, m.0ncvnwc
Cambridge, location.location.contains, Homerton College, Cambridge
Rutherford now began to investigate the nature of alpha rays., base.kwebbase.kwsentence.next_sentence, He was sure they consisted of positively charged particles and specifically either hydrogen or helium ions.
Cambridge, sports.sports_team_location.teams, Cambridge City F.C.
Cambridge, location.location.events, 2005 Cambridge Film Festival
m.0x1b520, award.award_honor.award_winner, James Chadwick
Cambridge, location.location.contains, Wolfson College, Cambridge
Cambridge, location.statistical_region.population, m.0ncvpfm
Cambridge, location.location.events, 1993 Cambridge Film Festival
Cambridge Airport, location.location.nearby_airports, Bourn Airfield
Cambridge, location.location.events, 1995 Cambridge Film Festival
Sedgwick Museum of Earth Sciences, travel.tourist_attraction.near_travel_destination, Cambridge
He also showed that bombardment with alpha particles had its limits, finding that large nuclei repelled them without disintegrating., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
The Gateway, book.newspaper.circulation_areas, Cambridge
Cambridge, location.location.contains, Long Road Sixth Form College
Sanditon, common.topic.notable_types, Book
Cambridge, location.location.events, 2006 Cambridge Film Festival
Cambridge, location.statistical_region.population, m.0ncvnls
Carl Woese, common.topic.notable_types, Academic
Cambridge, location.location.events, 2009 French Film Festival UK
Cambridge, location.statistical_region.population, m.0ncvn_t
Cambridge, location.location.contains, Parkside Community College
Ely Cathedral, travel.tourist_attraction.near_travel_destination, Cambridge
2009 French Film Festival UK, time.event.locations, Cambridge
Cambridge, location.location.events, 1978 Cambridge Film Festival
Cambridge, location.location.contains, Fitzwilliam College, Cambridge
He knew Balfour., base.kwebbase.kwsentence.previous_sentence, His work related to that of  Marie Curie and Ramsay.
Cambridge, location.location.contains, Newnham College, Cambridge
Cambridge, location.location.contains, Hills Road Sixth Form College
Cambridge, location.location.events, 2011 Cambridge Film Festival
Parker's Piece, travel.tourist_attraction.near_travel_destination, Cambridge
James Chadwick, military.military_person.participated_in_conflicts, World War I
James Chadwick, education.academic.advisees, Ernest C. Pollard
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, Most renowned achievement was demonstrating that the atom consisted of a small, dense nucleus surrounded by orbiting electrons.
Cambridge, location.location.events, 2012 Cambridge Film Festival
Cambridge, location.location.events, 2002 Cambridge Film Festival
James Chadwick, education.academic.advisees, Maurice Goldhaber
Westfield House, location.location.containedby, Cambridge
Cambridge, location.location.contains, Parker's Piece
In 1914, he found that positive rays consist of hydrogen nuclei., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
m.02_2b2z, influence.peer_relationship.peers, James Chadwick
Chadwick, symbols.namesake.named_after, James Chadwick
Rutherford now began to investigate the nature of alpha rays., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, location.location.contains, Wolfson College Boat Club
Earlier, in 1900, Bequerel had identified beta rays with cathode rays, which were shown to be electrons., base.kwebbase.kwsentence.next_sentence, And so the nature of radioactivity was now fully revealed.
He was sure they consisted of positively charged particles and specifically either hydrogen or helium ions., base.kwebbase.kwsentence.previous_sentence, Rutherford now began to investigate the nature of alpha rays.
Cambridge, common.topic.notable_types, City/Town/Village
Bringing Down the House: The Inside Story of Six MIT Students Who Took Vegas for Millions, book.written_work.next_in_series, Busting Vegas
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1bz
Collection of journal articles, common.topic.notable_types, Book
Cambridge, location.location.events, 2007 Strawberry Super 8 Film Festival
Bollington, location.location.containedby, Macclesfield
Cambridge, location.statistical_region.population, m.0ncvqs7
Cambridge, location.statistical_region.population, m.0ncvp5p
Coleridge Community College, location.location.containedby, Cambridge
Cambridge, travel.travel_destination.tourist_attractions, Christ's Pieces
m.03l6r06, education.education.student, James Chadwick
Frederick Soddy, common.topic.notable_types, Academic
In 1897 Rutherford took up the study of radioactivity, discovered in 1896 by French physicist Becquerel., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
James Chadwick, award.award_winner.awards_won, m.0b6ptdy
Cambridge, location.location.contains, Murray Edwards College
Cambridge, location.location.events, 2007 Cambridge Film Festival
Maurice Goldhaber, education.academic.advisors, James Chadwick
Cambridge, travel.travel_destination.tourist_attractions, Fitzwilliam Museum
His work related to that of  Marie Curie and Ramsay., base.kwebbase.kwsentence.next_sentence, He knew Balfour.
James Chadwick, education.academic.advisors, Hans Geiger
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, In 1897 Rutherford took up the study of radioactivity, discovered in 1896 by French physicist Becquerel.
From this research, Rutherford and Soddy in 1903 were able to put together the modern understanding of radioactivity., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, location.statistical_region.population, m.0b7l5br
James Chadwick, people.person.employment_history, m.09c2xkw
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1cs
World War I, time.event.locations, Middle East
Cambridge, location.citytown.postal_codes, CB2 8PX
Cambridge, location.location.events, 2013 Cambridge Film Festival
Ernest Rutherford, education.academic.advisees, James Chadwick
Cambridge, location.location.contains, Hughes Hall, Cambridge
Cambridge, location.location.events, 2004 Cambridge Film Festival
James Chadwick, common.topic.notable_types, Academic
Chadwick, common.topic.article, m.04xh6y
Cambridge, location.statistical_region.population, m.0ncvp3l
Cambridge Airport, location.location.time_zones, Greenwich Mean Time Zone
ernest rutherford corresponded with max planck, base.kwebbase.kwconnection.sentence, Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi.
Hans Geiger, base.kwebbase.kwtopic.has_sentences, Under Rutherford, Geiger began studying alpha particles, finding that two alpha particles appeared to be released when uranium disintegrated.
Academic, common.topic.article, m.03j456c
James Chadwick, symbols.name_source.namesakes, Chadwick
Cambridge, location.location.nearby_airports, Little Gransden Airfield
Cambridge, location.location.contains, Corpus Christi College, Cambridge
Chadwick, common.image.size, m.02bh08c
Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi., base.kwebbase.kwsentence.contains_connections, ernest rutherford corresponded with enrico fermi
Cambridge, location.statistical_region.population, m.0ncvnhj
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1d8
His results were used later in Langevin's development of sonar., base.kwebbase.kwsentence.next_sentence, During the War, Rutherford's also continued to work at Manchester.
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1f5
Cambridge, location.statistical_region.population, m.0ncvn6r
Cambridge, location.location.contains, Coleridge Community College
Cambridge, location.location.events, 2008 Cambridge Film Festival
Cambridge, location.location.contains, Abbey Stadium
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, He also showed that bombardment with alpha particles had its limits, finding that large nuclei repelled them without disintegrating.
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, From this research, Rutherford and Soddy in 1903 were able to put together the modern understanding of radioactivity.
Leslie H. Martin, common.topic.notable_types, Academic
Most renowned achievement was demonstrating that the atom consisted of a small, dense nucleus surrounded by orbiting electrons., base.kwebbase.kwsentence.next_sentence, Also demonstrated that splitting the atom can transmute one element into another.
Cambridge, location.location.events, 1994 Cambridge Film Festival
Cambridge, location.location.contains, Cambridge Junction
Cambridge, location.statistical_region.population, m.0ncvnrg
Cambridge, location.location.events, 1977 Cambridge Film Festival
Bollington, common.topic.article, m.01425q
Cambridge, location.location.events, 2009 Cambridge Film Festival
Pleasurewood Hills, travel.tourist_attraction.near_travel_destination, Cambridge
Cambridge, sports.sports_team_location.teams, Rhinos Volleyball Club
Cambridge Airport, aviation.airport.serves, Cambridge
Cambridge, location.location.contains, Holy Sepulchre, Cambridge
Lviv, common.topic.notable_types, City/Town/Village
James Chadwick, people.person.education, m.03l6r06
Cambridge, location.location.contains, Magdalene College, Cambridge
Hans Geiger, education.academic.advisees, James Chadwick
ernest rutherford corresponded with albert einstein, base.kwebbase.kwconnection.sentence, Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi.
James Chadwick, award.award_winner.awards_won, m.03zbgtx
m.02wnzqh, education.education.student, James Chadwick
Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi., base.kwebbase.kwsentence.contains_connections, ernest rutherford corresponded with max planck
During the War, Rutherford's also continued to work at Manchester., base.kwebbase.kwsentence.next_sentence, In 1914, he found that positive rays consist of hydrogen nuclei.
Cambridge, location.location.contains, St John's College, Cambridge
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, In 1914, he found that positive rays consist of hydrogen nuclei.
m.063x7hv, base.nobelprizes.nobel_honor.nobel_prize_winner, James Chadwick
Cambridge, location.statistical_region.population, m.0ncvn27
Cambridge, location.location.contains, Michaelhouse, Cambridge
Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
He and Edward Andrade, by diffracting them with a crystal, showed that gamma rays were electromagnetic waves., base.kwebbase.kwsentence.next_sentence, Measuring the  wavelengths of the rays, they found that they lay beyond X-rays in the electromagnetic spectrum.
James Chadwick, book.author.works_written, Radiations from Radioactive Substances
Making History, common.topic.notable_types, Book
World War I, time.event.locations, Asia
m.0x2g156, award.award_honor.award_winner, James Chadwick
Also demonstrated that splitting the atom can transmute one element into another., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, location.statistical_region.population, m.0ncvpjg
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, Measuring the  wavelengths of the rays, they found that they lay beyond X-rays in the electromagnetic spectrum.
Niels Henrik David Bohr, common.topic.notable_types, Academic
University of Cambridge, education.educational_institution.subsidiary_or_constituent_schools, Murray Edwards College
Cambridge, location.location.events, 2010 Cambridge Film Festival
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, He was sure they consisted of positively charged particles and specifically either hydrogen or helium ions.
Bollington, location.location.people_born_here, John Plant
Cambridge, location.location.contains, King's College, Cambridge
James Chadwick, people.person.education, m.02wnzqh
Cambridge, location.location.events, 1988 Cambridge Film Festival
Cambridge, location.location.events, 2001 Cambridge Film Festival
Cambridge, location.location.contains, Gonville and Caius College, Cambridge
His work related to that of  Marie Curie and Ramsay., base.kwebbase.kwsentence.contains_connections, ernest rutherford work related to marie curie
Joseph John Thomson, common.topic.notable_types, Academic
Ernest C. Pollard, education.academic.advisors, James Chadwick
Degas at Harvard, common.topic.notable_types, Book
Cambridge, location.location.events, 1996 Cambridge Film Festival
Cambridge, location.citytown.postal_codes, CB postcode area
Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi., base.kwebbase.kwsentence.next_sentence, After his death in 1937, Rutherford was buried in Westminster Abbey, London.
Cambridge, location.location.contains, Wesley House
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, Earlier, in 1900, Bequerel had identified beta rays with cathode rays, which were shown to be electrons.
Chadwick, common.topic.notable_for, g.125cb1610
Fitzwilliam Museum, travel.tourist_attraction.near_travel_destination, Cambridge
m.0774f_d, award.award_honor.award_winner, Maurice Goldhaber
And so the nature of radioactivity was now fully revealed., base.kwebbase.kwsentence.next_sentence, Rutherford returned to full research in 1919, when he made his last great discovery.
Parkside Community College, location.location.containedby, Cambridge
Cambridge, location.location.events, 1985 Cambridge Film Festival
Berlin, location.de_state.capital, Berlin
At his suggestion, the name \"proton\"  was given to the hydrogen nucleus in 1920., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, location.statistical_region.population, m.0ncvms4
James Chadwick, common.topic.article, m.017jtn
His work related to that of  Marie Curie and Ramsay., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, location.location.events, 1981 Cambridge Film Festival
Chadwick, common.topic.notable_types, Extraterrestrial location
m.05rlb3g, event.speech_or_presentation.speaker_s, Woodrow Wilson
The Home Life Of Henry W. Longfellow, common.topic.notable_types, Book
Cambridge, location.location.contains, Cambridge Regional College
Cambridge, sports.sports_team_location.teams, Cambridge University Cricket Club
Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi., base.kwebbase.kwsentence.contains_connections, ernest rutherford corresponded with albert einstein
Cambridge, location.location.events, 1980 Cambridge Film Festival
Cambridge, location.location.contains, Petersfield Cemetery, Cambridge
Cambridge, location.location.contains, Anglia Ruskin University, Cambridge Campus
Cambridge, location.location.events, 1987 Cambridge Film Festival
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, Also in 1920, Rutherford speculated that uncharged particles, which were later called neutrons, must also exist in the nucleus.
He knew Balfour., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Academic, freebase.type_profile.published, Published
Bollington, location.location.people_born_here, Terry Waite
Cambridge, travel.travel_destination.tourist_attractions, The Backs
Cambridge, location.location.events, 1991 Cambridge Film Festival
Academic, type.type.expected_by, Academics in this field
Cambridge, location.location.nearby_airports, Cambridge Airport
Cambridge, location.location.events, 2014 Strawberry Shorts Film Festival
Measuring the  wavelengths of the rays, they found that they lay beyond X-rays in the electromagnetic spectrum., base.kwebbase.kwsentence.previous_sentence, He and Edward Andrade, by diffracting them with a crystal, showed that gamma rays were electromagnetic waves.
James Chadwick, common.topic.notable_for, g.125734m57
His atomic model was anticipated by Lenard., base.kwebbase.kwsentence.previous_sentence, He worked with CP Snow.
Cambridge, location.location.events, 2014 Cambridge Film Festival
Bringing Down the House: The Inside Story of Six MIT Students Who Took Vegas for Millions, common.topic.notable_types, Book
Cambridge, location.location.contains, Christ's College, Cambridge
He and Edward Andrade, by diffracting them with a crystal, showed that gamma rays were electromagnetic waves., base.kwebbase.kwsentence.previous_sentence, In 1914, he found that positive rays consist of hydrogen nuclei.
Measuring the  wavelengths of the rays, they found that they lay beyond X-rays in the electromagnetic spectrum., base.kwebbase.kwsentence.next_sentence, Earlier, in 1900, Bequerel had identified beta rays with cathode rays, which were shown to be electrons.
Cambridge, location.location.nearby_airports, Bourn Airfield
Cambridge, location.location.contains, Denny Abbey and The Farmland Museum
Sedgwick Museum of Earth Sciences, location.location.containedby, United Kingdom
Bollington, location.location.people_born_here, James Bailey
He was sure they consisted of positively charged particles and specifically either hydrogen or helium ions., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
After his death in 1937, Rutherford was buried in Westminster Abbey, London., base.kwebbase.kwsentence.previous_sentence, Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi.
m.03l6r0c, education.education.student, James Chadwick
Cambridge, sports.sports_team_location.teams, Robinson College Boat Club
m.0b6ptdy, award.award_honor.award_winner, James Chadwick
Earlier, in 1900, Bequerel had identified beta rays with cathode rays, which were shown to be electrons., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, travel.travel_destination.tourist_attractions, Kettle's Yard
Busting Vegas, common.topic.notable_types, Book
Deep pockets, common.topic.notable_types, Book
He was sure they consisted of positively charged particles and specifically either hydrogen or helium ions., base.kwebbase.kwsentence.next_sentence, Deflection of the rays in electric and magnetic fields proved they were positive particles.
Measuring the  wavelengths of the rays, they found that they lay beyond X-rays in the electromagnetic spectrum., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
In 1897 Rutherford took up the study of radioactivity, discovered in 1896 by French physicist Becquerel., base.kwebbase.kwsentence.contains_connections, ernest rutherford work related to antoine-henri becquerel
Cambridge, location.location.events, 1989 Cambridge Film Festival
Also demonstrated that splitting the atom can transmute one element into another., base.kwebbase.kwsentence.previous_sentence, Most renowned achievement was demonstrating that the atom consisted of a small, dense nucleus surrounded by orbiting electrons.
James Chadwick, people.person.nationality, United Kingdom
This convinced Rutherford that the explanation must lie in the nature of the metal atoms in the foil., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1cd
Cambridge, location.location.events, 1984 Cambridge Film Festival
Busting Vegas, book.written_work.previous_in_series, Bringing Down the House: The Inside Story of Six MIT Students Who Took Vegas for Millions
Bollington, location.location.people_born_here, Billy Egerton
Cambridge, travel.travel_destination.tourist_attractions, Parker's Piece
In 1914, he found that positive rays consist of hydrogen nuclei., base.kwebbase.kwsentence.next_sentence, He and Edward Andrade, by diffracting them with a crystal, showed that gamma rays were electromagnetic waves.
Cambridge, location.location.events, 2003 Cambridge Film Festival
Cambridge, location.statistical_region.population, m.0ncvn9f
m.09c3cww, influence.peer_relationship.peers, James Chadwick
m.09c2xkw, business.employment_tenure.person, James Chadwick
m.02t82q2, common.webpage.topic, Cambridge
James Chadwick, award.award_winner.awards_won, m.0gmlkbr
Cambridge, location.location.contains, University of Cambridge
Earlier, in 1900, Bequerel had identified beta rays with cathode rays, which were shown to be electrons., base.kwebbase.kwsentence.previous_sentence, Measuring the  wavelengths of the rays, they found that they lay beyond X-rays in the electromagnetic spectrum.
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, However, he later observed the same effect when alpha particles were fired into nitrogen.
m.02kq464, business.employment_tenure.person, Ernest Rutherford
Cambridge, location.location.contains, Trinity College, Cambridge
James Chadwick, people.person.place_of_birth, Bollington
Deflection of the rays in electric and magnetic fields proved they were positive particles., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
James Chadwick, award.award_winner.awards_won, m.0x1b520
Capture of Cambridge, time.event.locations, Cambridge
James Chadwick, education.academic.advisors, Ernest Rutherford
In 1914, he found that positive rays consist of hydrogen nuclei., base.kwebbase.kwsentence.previous_sentence, During the War, Rutherford's also continued to work at Manchester.
His results were used later in Langevin's development of sonar., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
He taught Bragg., base.kwebbase.kwsentence.previous_sentence, His atomic model was anticipated by Lenard.
Edward Victor Appleton, common.topic.notable_types, Academic
James Chadwick, base.nobelprizes.nobel_prize_winner.nobel_honor, m.063x7hv
m.03zbgtx, award.award_honor.award_winner, James Chadwick
Deflection of the rays in electric and magnetic fields proved they were positive particles., base.kwebbase.kwsentence.previous_sentence, He was sure they consisted of positively charged particles and specifically either hydrogen or helium ions.
James Chadwick, influence.influence_node.peers, m.02_2b2z
20th century, time.event.includes_event, 1910s
m.0gmlkbr, award.award_honor.award_winner, James Chadwick
ernest rutherford corresponded with enrico fermi, base.kwebbase.kwconnection.sentence, Throughout the 30s, Rutherford maintained close contact with leading world scientists, in particular,  physicists Bohr,  Planck, Einstein and Fermi.
In 1919, Rutherford succeeded Thomson as director of the Cavendish Laboratory at Cambridge., base.kwebbase.kwsentence.previous_sentence, Also in 1920, Rutherford speculated that uncharged particles, which were later called neutrons, must also exist in the nucleus.
World War I, time.event.locations, Africa
He and Edward Andrade, by diffracting them with a crystal, showed that gamma rays were electromagnetic waves., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Macclesfield, location.location.contains, Bollington
Cambridge, location.location.events, 1979 Cambridge Film Festival
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1fl
James Chadwick, people.deceased_person.place_of_death, Cambridge
Cambridge, location.location.contains, Cambridge Judge Business School
Cambridge, location.location.contains, The Portland Arms
Cambridge, location.location.contains, Robinson College, Cambridge
East Setauket, location.hud_county_place.place, East Setauket
Also in 1920, Rutherford speculated that uncharged particles, which were later called neutrons, must also exist in the nucleus., base.kwebbase.kwsentence.next_sentence, In 1919, Rutherford succeeded Thomson as director of the Cavendish Laboratory at Cambridge.
Cambridge, location.location.events, 1983 Cambridge Film Festival
Cambridge, location.location.events, 1982 Cambridge Film Festival
Bollington, location.location.people_born_here, Libby Clegg
Cambridge, location.location.contains, Churchill College, Cambridge
Cambridge, location.location.events, 2014 Tour de France
Brightwater, common.topic.notable_types, City/Town/Village
Cambridge, location.location.contains, King's College School, Cambridge
However, he later observed the same effect when alpha particles were fired into nitrogen., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
Chadwick, astronomy.extraterrestrial_location.on_celestial_object, Moon
Bollington, location.location.people_born_here, James Chadwick
Cambridge, location.location.contains, Clare College, Cambridge
Cambridge, travel.travel_destination.how_to_get_here, m.0p3_1dt
Jupiter, common.topic.notable_types, City/Town/Village
Most renowned achievement was demonstrating that the atom consisted of a small, dense nucleus surrounded by orbiting electrons., base.kwebbase.kwsentence.kwtopic, Ernest Rutherford
James Chadwick, book.author.works_written, Collection of journal articles
James Chadwick, base.nobelprizes.nobel_prize_winner.nobel_honor, m.063x7hv
Cambridge, location.location.time_zones, Greenwich Mean Time Zone
Also in 1920, Rutherford speculated that uncharged particles, which were later called neutrons, must also exist in the nucleus., base.kwebbase.kwsentence.previous_sentence, At his suggestion, the name \"proton\"  was given to the hydrogen nucleus in 1920.
Cambridge, location.location.contains, Selwyn College, Cambridge
He worked with CP Snow., base.kwebbase.kwsentence.next_sentence, His atomic model was anticipated by Lenard.
At his suggestion, the name \"proton\"  was given to the hydrogen nucleus in 1920., base.kwebbase.kwsentence.next_sentence, Also in 1920, Rutherford speculated that uncharged particles, which were later called neutrons, must also exist in the nucleus.
m.09c2xkw, business.employment_tenure.company, University of Liverpool
Cambridge, travel.travel_destination.tourist_attractions, Ely Cathedral
Cambridge, location.location.events, 1990 Cambridge Film Festival
He knew Balfour., base.kwebbase.kwsentence.contains_connections, ernest rutherford knew arthur balfour
Bollington, location.location.people_born_here, John Ryle
Cambridge, location.location.contains, Westfield House
Brightwater, location.location.people_born_here, Ernest Rutherford
Ernest Rutherford, base.kwebbase.kwtopic.has_sentences, He and Edward Andrade, by diffracting them with a crystal, showed that gamma rays were electromagnetic waves.
Cambridge, location.location.nearby_airports, Duxford Aerodrome
Radiations from Radioactive Substances, book.written_work.author, James Chadwick
Cambridge, location.statistical_region.population, m.0ncvndr
James Chadwick, common.topic.image, Chadwick
And so the nature of radioactivity was now fully revealed., base.kwebbase.kwsentence.previous_sentence, Earlier, in 1900, Bequerel had identified beta rays with cathode rays, which were shown to be electrons.
Thomas Patrick Coohill, common.topic.notable_types, Academic
Cambridge, location.location.contains, Peterhouse, Cambridge
m.07715w5, award.award_honor.award_winner, Maurice Goldhaber
Cambridge, location.location.events, 1992 Cambridge Film Festival
Cambridge, location.location.contains, Cambridge University - Main Library

Answer: Neutron