The periodic table section has been archived, and is no longer updated.
For more information, see the About page.

Periodic Table

Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 Group 8 Group 9 Group 10 Group 11 Group 12 Group 13 Group 14 Group 15 Group 16 Group 17 Group 18
Period 1
1
H
Hydrogen
1.0
2
He
Helium
4.0
Period 2
3
Li
Lithium
6.941
4
Be
Beryllium
9.012
5
B
Boron
10.81
6
C
Carbon
12.01
7
N
Nitrogen
14.01
8
O
Oxygen
16.00
9
F
Flourine
19.00
10
Ne
Neon
20.18
Period 3
11
Na
Sodium
22.99
12
Mg
Magnesium
24.31
13
Al
Aluminum
26.98
14
Si
Silicon
28.09
15
P
Phosphorus
30.97
16
S
Sulfur
32.07
17
Cl
Chlorine
35.45
18
Ar
Argon
39.95
Period 4
19
K
Potassium
39.10
20
Ca
Calcium
40.08
21
Sc
Scandium
44.96
22
Ti
Titanium
47.88
23
V
Vanadium
50.94
24
Cr
Chromium
52.00
25
Mn
Manganese
54.94
26
Fe
Iron
55.85
27
Co
Cobalt
58.93
28
Ni
Nickel
85.69
29
Cu
Copper
63.55
30
Zn
Zinc
65.39
31
Ga
Gallium
69.72
32
Ge
Germanium
72.59
33
As
Arsenic
74.92
34
Se
Selenium
78.96
35
Br
Bromine
79.90
36
Kr
Krypton
83.80
Period 5
37
Rb
Rubidium
85.47
38
Sr
Strontium
87.62
39
Y
Yttrium
88.91
40
Zr
Zirconium
91.22
41
Nb
Niobium
92.91
42
Mo
Molybdenum
95.94
43
Tc
Technetium
(98)
44
Ru
Ruthenium
101.1
45
Rh
Rhodium
102.9
46
Pd
Palladium
106.4
47
Ag
Silver
107.9
48
Cd
Cadmium
112.4
49
In
Indium
114.8
50
Sn
Tin
118.7
51
Sb
Antimony
121.8
52
Te
Tellurium
127.6
53
I
Iodine
126.9
54
Xe
Xenon
131.3
Period 6
55
Cs
Cesium
132.9054
56
Ba
Barium
137.33
71
Lu
Lutetium
174.967
72
Hf
Hafnium
178.49
73
Ta
Tantalum
180.9479
74
W
Tungsten
183.85
75
Re
Rhenium
186.207
76
Os
Osmium
190.2
77
Ir
Iridium
192.22
78
Pt
Platinum
195.08
79
Au
Gold
196.9665
80
Hg
Mercury
200.59
81
Tl
Thallium
204.383
82
Pb
Lead
207.2
83
Bi
Bismouth
208.9804
84
Po
Polonium
(209)
85
At
Astatine
(210)
86
Rn
Radon
(222)
Period 7
87
Fr
Francium
(223)
88
Ra
Radium
226.0254
103
Lr
Lawrencium
(260)
104
Rf
Rutherfordium
(261)
105
Db
Dubnium
(262)
106
Sg
Seaborgium
(263)
107
Bh
Bohrium
(262)
108
Hs
Hassium
(265)
109
Mt
Meitnerium
(266)
110
Uun
Ununnilium
(269)
111
Uuu
Unununium
(272)
112
Uub
Ununbium
(277)

57
La
Lanthanum
138.9055
58
Ce
Cerium
140.12
59
Pr
Praseodymium
140.9077
60
Nd
Neodymium
144.24
61
Pm
Promethium
(145)
62
Sm
Samarium
150.36
63
Eu
Europium
151.96
64
Gd
Gadolinium
157.25
65
Tb
Terbium
158.9254
66
Dy
Dysprosium
162.50
67
Ho
Holmium
164.9304
68
Er
Erbium
167.26
69
Tm
Thulium
168.9342
70
Yb
Ytterbium
173.04
89
Ac
Actinium
227.0278
90
Th
Thorium
232.0381
91
Pa
Proactinium
231.0359
92
U
Uranium
238.0298
93
Np
Neptunium
237.048
94
Pu
Plutonium
(244)
95
Am
Americium
(243)
96
Cm
Curium
(247)
97
Bk
Berkelium
(247)
98
Cf
Californium
(251)
99
Es
Einsteinium
(252)
100
Fm
Fermium
(257)
101
Md
Mendelevium
(258)
102
No
Nobelium
(259)

Key

Metal Nonmetal Metalloid
SolidLiquidGas (At room temp.)