I^1
Groups of
I II V
MENDELEEV'S PERIODIC
II 2
Li 3
Lithium
6.
Be 4
Beryllium
9.
5 B
Boron
10.
6 C
Carbon
12.
7 N
Nitrogen
14.
III^3
Na 11
Sodium
22.
Mg 12
Magnesium
24.
13 Al
Aluminium
26.
14 Si
Silicon
28.
15 P
Phosphorus
30.
IV
4
IC 19
Potassium
39.
Ca 20
Calcium
40.
Sc 21
Scandium
44.
Ti 22
Titanium
47.
V 23
Vanadium
50.
5
29 Cu
Copper
63.
30 Zn
Zinc
65.
31 Ga
Gallium
69.
32 Ge
Germanium
72.
33 As
Arsenic
74.
V
6
Rb 37
Rubidium
85.
Sr 38
Strontium
87.
Y 39
Yttrium
88.
Zr 40
Zirconium
91.
Nb 41
Niobium
92.
7
47 Ag
Silver
107.
48 Cd
Cadmium
112.
49 In
Indium
114.
50 Sn
Tin
118.
(^51) Sb
Antimony
121.
VI
8
Cs 55
Cesium
132.
Ba 56
Barium
137.
La 57
Lanthanum
138.
- Hf 72
t, Hafnium
co ko
- Ta 73
Tantalum
9
79 Au
Gold
80 Hg
Mercury
(^81) Ti
Thallium
82 Pb
Lead
83 Bi
Bismuth
VII 1 0
Fr 87
Francium
[223]
Ra 88
Radium
Ac 89
Actinium
[227]
- Ku 104 C.
(^2) Kurchatovium
c; a [261]
105 - LANTHANI
Ce 58 Pr 59 Nd 60 Pm 61 Sm 62 Eu 63 Gd^64
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium
140.12 140.907 144.24 [145] 150.35 151.96 157.
** ACTINI
Th 90 Pa 91 U 92 Np 93 Pu 94 Am 95 Cm 96
Thorium Protactinium Uranium Neptunium Plutonium Americium Curium
232.038 231.0359 238.03 [237] [244] [243] [247]