August Wilhelm Hofmann
Joseph P riestley
F riedrch Wohler
J
Frederick Sanger RN A DNA
RN A DN A RN A RN A FX DNA RNA W P DN A DN A
Pieltte Engene Marceiin Berthelot
Emil Fischer
N H N H C H N HN H C HO
CH O H CN
A H A M A E
F rederick Soddy
a b g
a b a b a a
a b a b
Theodore William Richard s
Cl
Stanislao Cannizzaro H O CH CH
William Ramsay
Rayleighj
Q X H Madan Argon Bachanan
Krypton nove neon xenon
Robert Burus Woodwrd R Hoffmann
G Wilkinscn E O Fischer B B B B
B B B A Eschenioser
Carl Wilhelm Scheele
HgO K NO KMnO AgCOHgCO
MnO HCl MnCl H O Cl Cl
J W S Rayleigh R J Strutt
N
N N Argon
Josep h Louis Gay Lussac
KO HNaO H bore l
l BFH F