IA 1
H
1
Hydrogen
1.00797 2
Li
3
3
9.01218
B
Symbol Name
Magnesium
22.98977
24.305
12.011 Atomic Weight [ ( ) indicates most stable or best known isotope] 10.81
13
VIII
IIIB
20
21
IVB
22
K
Ca
Sc
Ti
Potassium
Calcium
Scandium
Titanium
39.0983
40.08
44.9559
47.90
38
39
40
Rb
Sr
Y
Rubidium
Strontium
Yttrium
Zirconium
85.4678
87.62
88.9059
91.22
56
5
Boron
Na Mg
57
VB
V
VIB
23
24
VIIB 644444474444448 IB
25
Cr Mn Fe
Vanadium Chromium Manganese
50.9415
26
51.996
41
42
54.9380
43
Iron
55.847
44
27
28
IIB
29
30
72
92.9064
73
95.94
74
(98)
75
101.07
76
C
VA
6
N
7
Carbon
Nitrogen
12.011
14.0067
14
15
VIA
O
8
Oxygen
VIIA
F
9
Fluorine
4.00260
10
Ne Neon
15.9994 18.998403 20.179
17
Al
Si
P
Silicon
Phosphorus
Sulfur
Chlorine
Argon
26.98154 28.0855 30.97376
32.06
35.453
39.948
32
33
34
Cl
18
Aluminum
31
S
16
35
Ar
36
Co
Ni
Cu Zn Ga Ge
As
Se
Br
Kr
Cobalt
Nickel
Copper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
58.9332
58.70
63.546
65.38
69.72
72.59
74.9216
78.96
79.904
83.80
45
46
47
48
Zr Nb Mo Tc Ru Rh Pd Ag Cd Niobium Molybdenum Technetium Ruthenium
IVA
Helium
49
50
51
52
53
54
In
Sn
Sb
Te
I
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
102.9055
106.4
107.868
112.41
114.82
118.69
121.75
127.60
126.9045
131.30
77
78
79
80
82
83
84
85
86
Cs
Ba
La
Hf
Ta
W
Re
Os
Ir
Pt
Tl
Pb
Bi
Po
At
Rn
Barium
Lanthanum
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Polonium
Astatine
Radon
132.9054
137.33
138.9055
178.49
180.9479
183.85
186.207
190.2
192.22
195.09
196.9665
200.59
204.37
207.2
208.9804
(209)
(210)
(222)
Fr
Francium
(223)
88
89
Ra Ac Radium
104
Rf
105
Db
106
Sg
Actinium Rutherfordium Dubnium Seaborgium
226.0254 227.0278
(261)
58
Lanthanides
Ce
(262)
(263)
59
60
107
108
Actinides
110
111
112
113
114
115
Bh Hs Mt Uun Uuu Uub — Uuq — Bohrium
Hassium
(262)
(255)
61
62
Meitnerium Ununnilium Unununium Ununbiium
(256)
63
(269)
64
(272)
65
116
—
117
—
Ununquadium
(277)
66
67
68
69
70
71
Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Cerium PraseodymiumNeodymium Promethium Samarium
140.12
140.9077
144.24
Th
Pa
U
90
109
Au Hg
81
Xe
Cesium
87
7
C Carbon
He
IIIA
6 Atomic Number
12
Sodium
55
6
Be
4
6.941
37
5
IIA
Beryllium
19
4
The Periodic Table of the Elements
Lithium
11
VIIIA 2
91
92
Thorium Protactinium Uranium
(145)
93
150.4
94
Europium Gadolinium
151.96
95
157.25
96
Terbium
158.9254
97
Np Pu Am Cm Bk Neptunium Plutonium Americium
232.0381 231.0359 238.029 237.0482
(244)
(243)
Curium
(247)
Dysprosium Holmium
162.50
98
Cf
164.9304
99
Erbium
Thulium
Ytterbium
Lutetium
167.26
168.9342
173.04
174.967
100
101
102
Es Fm Md No
103
Lr
Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium
(247)
(251)
(252)
(257)
(258)
(250)
(260)
118
—