[DOC] [TLE] The Parts of the Periodic Table - Angelo State University [PAR] The actinides, elements 90-103, follow actinium on the periodic table. ... All of the 
isotopes of thorium are radioactive; the most stable isotope is ... It emits alpha 
particles and gamma rays, and is non-fissionable, absorbing neutrons instead of 
splitting. .... uranium-239, which underwent beta decay to produce neptunium-
239. [DOC] [TLE] Neptunium - Wikipedia [PAR] Neptunium is a chemical element with symbol Np and atomic number 93. A 
radioactive actinide metal, neptunium is the first transuranic element. Its position 
in the periodic table just after uranium, named after the planet ... It, and the 
isotope neptunium-239, are also found in trace amounts in uranium ores due to 
neutron... [DOC] [TLE] Curium - Wikipedia [PAR] Curium is a transuranic radioactive chemical element with symbol Cm and atomic 
number 96. ... They predominantly emit -particles, and the heat released in this 
process ... isotope was produced in JulyAugust 1944 by bombarding 239Pu 
with ... any new transuranium element beside plutonium and neptunium had 
been... [DOC] [TLE] transuranium element | chemical element | Britannica.com [PAR] click to become a member! ... The above process is called negative beta-particle 
decay. ... The discovery of the next element after neptunium followed rapidly. ... 
Plutonium, as the isotope plutonium-239, is produced in ton quantities in nuclear 
... The sequence of nuclides that can be synthesized in nuclear reactors by this... [DOC] [TLE] Problems of Plutonium: real and imagined - MyWeb [PAR] Plutonium's use has become a serious matter of debate and is confusing 
because it ... The idea that atomic elements could emit vast quantities of energy 
as waves and ... The atomic element Plutonium (239Pu) -- named for the planet 
Pluto and .... that emit alpha particles and nothing else (plutonium-239 is such an 
isotope)... [DOC] [TLE] November 16, 2008 [PAR] ... breaks down into the 226 isotope of this Curie-ous element Radium Oops! ... 
As in planetary sequence, neptunium-239 emits a beta particle and becomes... [DOC] [TLE] Plutonium - Office of Scientific and Technical Information [PAR] Isotopes of an element have the same atomic number but dif- ferent atomic ..... 
neptunium-239 nucleus also emits a beta particle, and is thus convei ted to long-
... [DOC] [TLE] If uranium-239 undergoes a beta emission and then another, what ... [PAR] May 24, 2007 ... The isotope that is produced is Plutonium-239 (Pu-239). This is ... Then 
neptunium-239 also emits a beta particle and becomes plutonium-239. [DOC] [TLE] actinide series facts, information, pictures | Encyclopedia.com ... [PAR] By continuing to emit particles, the isotope of one element may even turn into the 
isotope ... Eventually the radioisotope becomes a stable isotope, one that is not 
subject to .... Just as neptunium had been named for the next planet beyond 
Uranus, ... in 1944, it was first produced in a nuclear reaction involving plutonium-
239. [DOC] [TLE] page proofs - Wiley [PAR] Marie and Pierre Curie separate out radioactive elements in minerals, .... When 
uranium-238 accepts a neutron, it becomes uranium-239, which .... It emits an  
particle, with two protons and two neutrons. e ... isotope. parent nucleus daughter 
nucleus alpha particle. Alpha decay: a nucleus ..... a decay series, is the 
sequence. [DOC] [TLE] IN THE SEARCH OF SUPERHEAVY ELEMENTS BY RUKIYA ALIYI ... [PAR] of the element neptunium, atomic number 93 and mass number 239. The above 
process is called negative beta-particle decay. A nucleus may also emit a... [DOC] [TLE] Isotopes of uranium - Topics [PAR] Uranium (U) is a naturally occurring radioactive element that has no stable ... 
Finally, Pa-234 nuclei emit another beta particle to become U-234 nuclei. ... 239 
U has a half-life of about 23.45 minutes and decays into neptunium-239 through 
beta ...... The abundance of an isotope varies from planet to planet, and even 
from... [DOC] [TLE] Uranium - Personal Web Sites... [PAR] Jan 20, 2003 ... The elements of these subjects are not hard to understand, and can go a ... and 
named it uranium after the ultimate planet in the solar

Question: As in planetary sequence, neptunium-239 emits a beta particle & becomes isotope 239 of this element
Answer: plutonium