1
IA
11A
1
H
2
IIA
2A
Hydrogen
1.008
3
Li
Lithium
6.941
11
Na
Sodium
22.990
19
K
Potassium
39.098
37
Rb
Rubidium
84.468
55
Cs
Cesium
132.905
87
Fr
Francium
223.020
4
Periodic Table of the Elements
2
13
IIIA
3A
5
Be
13
Mg
Magnesium
24.305
Ca
Calcium
40.078
38
Sr
Strontium
87.62
56
Ba
21
3
IIIB
3B
22
Sc
Scandium
44.956
39
Y
Yttrium
88.906
Ra
23
Ti
Titanium
47.88
40
57-71
Zr
72
Hafnium
178.49
104
Lanthanide
Series
Actinide
Series
Rutherfordium
[261]
57
La
89
Ac
Actinium
227.028
Tantalum
180.948
Cerium
140.115
90
Th
Thorium
232.038
43
Tc
Technetium
98.907
75
W
Re
Tungsten
183.85
Rhenium
186.207
106
Dubnium
[262]
Sg
107
Seaborgium
[266]
Pr
Bh
Pa
Protactinium
231.036
Alkaline
Earth
Fe
Iron
55.933
44
Ru
Ruthenium
101.07
76
Os
Osmium
190.23
108
Hs
Hassium
[269]
61
62
60
Nd
92
26
Bohrium
[264]
Praseodymium Neodymium
140.908
144.24
91
8
Manganese
54.938
Molybdenum
95.94
Ta
Ce
Alkali
Metal
Chromium
51.996
74
7
VIIB
7B
Mn
Mo
Niobium
92.906
59
25
42
Nb
Db
6
VIB
6B
Cr
Vanadium
50.942
58
Lanthanum
138.906
V
105
Rf
Radium
226.025
24
73
Hf
89-103
5
VB
5B
41
Zirconium
91.224
Barium
137.327
88
4
IVB
4B
U
Uranium
238.029
Transition
Metal
27
93
Np
Cobalt
58.933
45
Rh
Rhodium
102.906
77
Ir
29
Ni
Nickel
58.693
46
Pd
Palladium
106.42
Pt
110
Mt
11
IB
1B
Cu
47
Ag
Ds
111
Rg
31
Ga
Zinc
65.39
Gallium
69.732
48
49
Cd
Cadmium
112.411
80
Mercury
200.59
Pu
Plutonium
244.064
63
64
Eu
Gd
Europium
151.966
Gadolinium
157.25
95
96
Am Cm
Americium
243.061
Nonmetal
Curium
247.070
Basic
Metal
65
Tb
Terbium
158.925
97
Bk
Berkelium
247.070
Halogen
Tl
113
Meitnerium Darmstadtium Roentgenium Copernicium
[268]
[269]
[272]
[277]
Uut
Ununtrium
unknown
66
Dy
Dysprosium
162.50
98
Cf
Californium
251.080
Noble
Gas
Si
Silicon
28.086
32
33
Ge
As
Germanium
72.61
Sb
Tin
118.71
Antimony
121.760
83
Pb
Lead
207.2
Flerovium
[289]
68
Holmium
164.930
99
Es
Bi
115
Fl
Ne
S
Sulfur
32.066
Neon
20.180
18
Cl
Ar
Chlorine
35.453
34
Se
Selenium
78.09
52
Te
Tellurium
127.6
Po
Polonium
[208.982]
116
Argon
39.948
35
36
Br
Kr
Bromine
79.904
53
Krypton
84.80
54
I
Xe
Iodine
126.904
85
Xenon
131.29
86
At
Rn
Astatine
209.987
Radon
222.018
117
118
Uus Uuo
Ununpentium Livermorium Ununseptium
unknown
[298]
unknown
Er
100
Lanthanide
10
F
17
Fm
Fermium
257.095
69
Tm
Thulium
168.934
101
Md
Mendelevium
258.1
He
Helium
4.003
Fluorine
18.998
Uup Lv
Erbium
167.26
Einsteinium
[254]
Oxygen
15.999
84
Bismuth
208.980
114
Ho
Arsenic
74.922
51
Sn
67
P
17
VIIA
7A
9
O
16
Phosphorus
30.974
82
Thallium
204.383
112
Cn
In
N
15
16
VIA
6A
8
Nitrogen
14.007
50
Indium
114.818
81
Hg
Gold
196.967
Al
Aluminum
26.982
Zn
Silver
107.868
Au
12
IIB
2B
30
Copper
63.546
79
Platinum
195.08
109
94
Semimetal
28
78
Iridium
192.22
Samarium
150.36
Neptunium
237.048
10
Co
Pm Sm
Promethium
144.913
9
VIII
8
Carbon
12.011
14
15
VA
5A
7
C
Boron
10.811
12
20
6
B
Beryllium
9.012
14
IVA
4A
18
VIIIA
8A
70
Yb
Ytterbium
173.04
102
No
Nobelium
259.101
Ununoctium
unknown
71
Lu
Lutetium
174.967
103
Lr
Lawrencium
[262]
Actinide
© 2013 Todd Helmenstine
chemistry.about.com
sciencenotes.org