[DOC] [TLE] Prout's hypothesis - Wikipedia [PAR] Prout's hypothesis was an early 19th-century attempt to explain the existence of 
the various chemical elements through a hypothesis regarding the internal 
structure of the atom. In 1815 and 1816, the English chemist William Prout 
published two papers in which he observed that the atomic ... He then 
hypothesized that the hydrogen atom was the only truly fundamental... [DOC] [TLE] William Prout - Wikipedia [PAR] William Prout FRS (15 January 1785  9 April 1850) was an English chemist, 
physician, and natural theologian. He is remembered today mainly for what is 
called Prout's hypothesis. ... In 1815, based on the tables of atomic weights 
available at the time, he anonymously hypothesized that the atomic weight of 
every element... [DOC] [TLE] Prout's hypothesis: teaching notes - Le Moyne [PAR] References: William Prout, "On the Relation between the Specific Gravities of 
Bodies ... State and the Weights of their Atoms," Annals of Philosophy 6, 321-30 (
1815); ... however, Prout was best known for the hypothesis that atomic weights 
were ... after all: practically all the mass of atoms is in their nuclei, which are 
made of... [DOC] [TLE] hydrogen atom [PAR] All matter is made of tiny, indivisible particles called atoms; Change is caused 
by ... (but there were earlier attempts by others). 13. Mendeleev's ... William Prout 
(1815). hypothesized that the hydrogen atom is fundamental; all other elements... [DOC] [TLE] Is all matter made of just one element? | Feature | Chemistry World [PAR] Apr 2, 2015 ... William Prout's answer to this perennial question launched two centuries of ... In 
1815 William Prout revisited the idea, with far-reaching ... Nevertheless, the idea 
that all the supposed elements were made up of hydrogen atoms ... Integral 
atomic numbers appeared more compatible with Prout's hypothesis... [DOC] [TLE] William Prout: Early 19th Century Physician-Chemist | Clinical ... [PAR] Prout stimulated much discussion on atomic theory by his hypothesis that the 
atomic weights of all chemical elements are whole-number multiples of the 
atomic weight of ... Like many other 19th century physicians of humble origins, 
Prout's earlier ... Most of his analyses and scientific experiments were made with 
ingenious... [DOC] [TLE] William Prout - Revolvy [PAR] William Prout FRS (15 January 1785  9 April 1850) was an English chemist , 
physician, ... and that the atoms of the other elements are made of groupings of 
various ..... He then hypothesized that the hydrogen atom was the only truly 
fundamental ... nuclei of all elements were made of such particles (the hydrogen 
nucleus),... [DOC] [TLE] Prout's hypothesis - Topics [PAR] In 1815 and 1816, the English chemist William Prout published two papers in 
which ... He then hypothesized that the hydrogen atom was the only truly 
fundamental object, which he called protyle , and that the atoms of other 
elements were actually ... nuclei of all elements were made of such particles (the 
hydrogen nucleus),... [DOC] [TLE] William Prout (1785-1850). - ACS Publications [PAR] In this paper there were compared the "atomic weights" of various elements and 
their ... others far superior to himself in chemical acquirements and fame. 
Although Prout ... Avogadro's hypothesis that eqpal volumes of gases, ... Prout's 
rule applied to "the atoms of all the simvle sub- .~ ... a Annals of Philosophy, 6, 
321 (1815). [DOC] [TLE] Prout's hypothesis | history of science 101 [PAR] WILLIAM PROUT. He took this as proof that all atoms were actually made from 
hydrogen atoms and the idea was adopted as atomic theory and used for later... [DOC] [TLE] PPLATO | FLAP | PHYS 7.1: The atomic basis of matter [PAR] They proposed that all matter is made up of innumerable atoms, all with identical 
... William Prout i further hypothesized in 1815 that all elements were composed 
of combinations of a single fundamental particle, the atom of hydrogen. ... Ludwig 
Boltzmann i extended these ideas to other forms of matter, including liquids and... [DOC] [TLE]

Question: In 1815 William Prout hypothesized that this was the fundamental atom & all other atoms were made of it
Answer: hydrogen