Mendeleev

The most famous work that was done in developing the periodic table was done by a Russian chemist, Dmitri Mendeleev. Mendeleev developed his periodic table in 1869. It was a table, not a graph. It was a two-dimensional arrangement in which elements having similar properties were placed adjacent to one another. It took several forms as it developed.

Mendeleev 1869
Ti=50 Zr=90 ?=180
V=51 Nb=94 Ta=182
Cr=52 Mo=96 W=186
Mn=55 Rh=104.4 Pt=197.4
Fe=56 Ru=104.4 Ir=198
Ni=Co=59 Pd=106.6 Os=199
H=1 Cu=63.4 Ag=108 Hg=200
Be=9.4 Mg=24 Zn=65.2 Cd=112
B=11 Al=27.4 ?=68 Ur=116 Au=197?
C=12 Si=28 ?=70 Sn=118
N=14 P=31 As=75 Sb=122 Bi=210?
O=16 S=32 Se=79.4 Te=128?
F=19 Cl=35.5 Br=80 I=127
Li=7 Na=23 K=39 Rb=85.4 Cs=133 Tl=204
Ca=40 Sr=87.6 Ba=137 Pb=207
?=45 Ce=92
?Er=56 La=92
?Yt=60 Di=95
?In=75.6 Th=118?
Simplification by Mendeleev, also 1869
Li
7		 Na
23		 K
39		 Cu
63.4		 Rb
85.4		 Ag
108		 Cs
133		 -
 Tl
204
Be Mg Ca Zn Sr Cd Ba - Pb
B Al - - - Ur - - Bi?
C Si Ti - Zr Sn - - -
N P V As Nb Sb - Ta -
O S - Se - Te - W -
F
19		 Cl
35.5		 -
58		 Br
80		 -
190		 I
127		 -
160		 -
190		 -
220