Periodic Table Of The Elements
Group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
IA
VIII
1
1
1
H Hydrogen
Atomic Weight: 1.00794(7) 2 3 4
Molecular Weight:
Electron Shells:
IIA
IIIB
IVB
VB
VIB
VIIB
2
4
He Helium
Atomic Weight: 4.002602(2) 2 4
Molecular Weight:
Electron Shells:
2
3
6
Li Lithium
Atomic Weight: 6.941(2) 2 3 4 5
Molecular Weight:
Electron Shells:
4
9
Be Berilium
Atomic Weight: 9.012182(3)
Molecular Weight:
Electron Shells:
5
11
B Boron
Atomic Weight: 10.811(7) 2 3 4
Molecular Weight:
Electron Shells:
6
12
C Carbon
Atomic Weight: 12.0107(8) 2 4
Molecular Weight:
Electron Shells:
7
14
N Nitrogen
Atomic Weight: 14.0067(2) 2 4
Molecular Weight:
Electron Shells:
8
16
O Oxygen
Atomic Weight: 15.9994(3) 2 4
Molecular Weight:
Electron Shells:
9
19
F Flurine
Atomic Weight: 18.9984032(5)
Molecular Weight:
Electron Shells:
10
20
Ne Neon
Atomic Weight: 20.1797(6) 2 3
Molecular Weight:
Electron Shells:


P
e
r
i
o
d
3
11
23
Na Sodium
Atomic Weight: 22.989770(2)
Molecular Weight:
Electron Shells:
12
24
Mg Magnesium
Atomic Weight: 24.3050(6)
Molecular Weight:
Electron Shells:
IIIA
IVA
VA
VIA
VIIA
VIIIA
VIIIA
VIIIA
IB
IIB
13
27
Al Aluminium
Atomic Weight: 26.981538(2)
Molecular Weight:
Electron Shells:
14
28
Si Silicon
Atomic Weight: 28.0855(3) 4
Molecular Weight:
Electron Shells:
15
31
P Phosphoris
Atomic Weight: 30.973761(2)
Molecular Weight:
Electron Shells:
16
32
S Solpher
Atomic Weight: 32.065(5) 2 4
Molecular Weight:
Electron Shells:
17
35
Cl Clorine
Atomic Weight: 35.453(2) 2 3 4
Molecular Weight:
Electron Shells:
18
40
Ar Argon
Atomic Weight: 39.948(1) 2 4
Molecular Weight:
Electron Shells:
4
19
39
K Potasium
Atomic Weight: 39.0983(1)
Molecular Weight:
Electron Shells:
20
40
Ca Calcium
Atomic Weight: 40.078(4) 2
Molecular Weight:
Electron Shells:
21
45
Sc Scandium
Atomic Weight: 44.955910(8)
Molecular Weight:
Electron Shells:
22
48
Ti Titanium
Atomic Weight: 47.867(1)
Molecular Weight:
Electron Shells:
23
51
V Vanadium
Atomic Weight: 50.9415(1)
Molecular Weight:
Electron Shells:
24
52
Cr Cromium
Atomic Weight: 51.9961(6)
Molecular Weight:
Electron Shells:
25
55
Mn Manganese
Atomic Weight: 54.938049(9)
Molecular Weight:
Electron Shells:
26
56
Fe Iron
Atomic Weight: 55.845(2)
Molecular Weight:
Electron Shells:
27
59
Co Cobolt
Atomic Weight: 58.933 200(9)
Molecular Weight:
Electron Shells:
28
59
Ni Nickel
Atomic Weight: 58.6934(2)
Molecular Weight:
Electron Shells:
29
64
Cu Copper
Atomic Weight: 63.546(3) 4
Molecular Weight:
Electron Shells:
30
65
Zn Zinc
Atomic Weight: 65.409(4)
Molecular Weight:
Electron Shells:
31
70
Ga Galium
Atomic Weight: 69.723(1)
Molecular Weight:
Electron Shells:
32
73
Ge Gemanium
Atomic Weight: 72.64(1)
Molecular Weight:
Electron Shells:
33
75
As Arsnic
Atomic Weight: 74.92160(2)
Molecular Weight:
Electron Shells:
34
79
Se Selenium
Atomic Weight: 78.96(3) 4
Molecular Weight:
Electron Shells:
35
80
Br Bromine
Atomic Weight: 79.904(1)
Molecular Weight:
Electron Shells:
36
84
Kr Krypton
Atomic Weight: 83.798(2) 2 3
Molecular Weight:
Electron Shells:
5
37
85
Rb Rubidium
Atomic Weight: 85.4678(3) 2
Molecular Weight:
Electron Shells:
38
88
Sr Strontium
Atomic Weight: 87.62(1) 2 4
Molecular Weight:
Electron Shells:
39
89
Y Yttrium
Atomic Weight: 88.90585(2)
Molecular Weight:
Electron Shells:
40
91
Zr Zirconium
Atomic Weight: 91.224(2) 2
Molecular Weight:
Electron Shells:
41
93
Nb Niobium
Atomic Weight: 92.906 38(2)
Molecular Weight:
Electron Shells:
42
96
Mo Molybdeum
Atomic Weight: 95.94(2) 2
Molecular Weight:
Electron Shells:
43
98
Tc Technetium
Atomic Weight: [98] 1
Molecular Weight:
Electron Shells:
44
101
Ru Ruthenium
Atomic Weight: 101.07(2) 2
Molecular Weight:
Electron Shells:
45
103
Rh Rhodium
Atomic Weight: 102.905 50(2)
Molecular Weight:
Electron Shells:
46
106
Pd Palladium
Atomic Weight: 106.42(1) 2
Molecular Weight:
Electron Shells:
47
108
Ag Silver
Atomic Weight: 107.8682(2) 2
Molecular Weight:
Electron Shells:
48
112
Cd Cadnium
Atomic Weight: 112.411(8) 2
Molecular Weight:
Electron Shells:
49
115
In Indium
Atomic Weight: 114.818(3)
Molecular Weight:
Electron Shells:
50
119
Sn Tin
Atomic Weight: 118.710(7) 2
Molecular Weight:
Electron Shells:
51
122
Sb Antimony
Atomic Weight: 121.760(1) 2
Molecular Weight:
Electron Shells:
52
128
Te Technetium
Atomic Weight: 127.60(3) 2
Molecular Weight:
Electron Shells:
53
127
I Iodine
Atomic Weight: 126.904 47(3)
Molecular Weight:
Electron Shells:
54
131
Xe Xenon
Atomic Weight: 131.293(6) 2 3
Molecular Weight:
Electron Shells:
6
55
133
Cs Caesium
Atomic Weight: 132.905 45(2)
Molecular Weight:
Electron Shells:
56
137
Ba Barium
Atomic Weight: 137.327(7)
Molecular Weight:
Electron Shells:
Lanthanides
72
178
Hf Hafnium
Atomic Weight: 178.49(2)
Molecular Weight:
Electron Shells:
73
181
Ta Tantalum
Atomic Weight: 180.9479(1)
Molecular Weight:
Electron Shells:
74
184
W Tungsten
Atomic Weight: 183.84(1)
Molecular Weight:
Electron Shells:
75
186
Re Rhenium
Atomic Weight: 186.207(1)
Molecular Weight:
Electron Shells:
76
190
Os Osmium
Atomic Weight: 190.23(3) 2
Molecular Weight:
Electron Shells:
77
192
Ir Iridium
Atomic Weight: 192.217(3)
Molecular Weight:
Electron Shells:
78
195
Pt Platnum
Atomic Weight: 195.078(2)
Molecular Weight:
Electron Shells:
79
197
Au Gold
Atomic Weight: 196.966 55(2)
Molecular Weight:
Electron Shells:
80
201
Hg Mercury
Atomic Weight: 200.59(2)
Molecular Weight:
Electron Shells:
81
204
Tl Thallium
Atomic Weight: 204.3833(2)
Molecular Weight:
Electron Shells:
82
207
Pb Lead
Atomic Weight: 207.2(1) 2 4
Molecular Weight:
Electron Shells:
83
209
Bi Bismuth
Atomic Weight: 208.980 38(2)
Molecular Weight:
Electron Shells:
84
210
Po Polonium
Atomic Weight: [210] 1
Molecular Weight:
Electron Shells:
85
210
At Astatine
Atomic Weight: [210] 1
Molecular Weight:
Electron Shells:
86
220
Rn Radon
Atomic Weight: [220] 1
Molecular Weight:
Electron Shells:
7
87
223
Fr Francium
Atomic Weight: [223] 1
Molecular Weight:
Electron Shells:
88
226
Ra Radium
Atomic Weight: [226] 1
Molecular Weight:
Electron Shells:
Actinides
104
261
Rf Rutherfordium
Atomic Weight: 261 1
Molecular Weight:
Electron Shells:
105
262
Db Dubnium
Atomic Weight: [262] 1
Molecular Weight:
Electron Shells:
106
266
Sg Seaborgium
Atomic Weight: [266] 1
Molecular Weight:
Electron Shells:
107
264
Bh Bhorium
Atomic Weight: [264] 1
Molecular Weight:
Electron Shells:
108
277
Hs Hassium
Atomic Weight: [277] 1
Molecular Weight:
Electron Shells:
109
268
Mt Meiterium
Atomic Weight: [268] 1
Molecular Weight:
Electron Shells:
110
271
Ds Damstadium
Atomic Weight: [271] 1
Molecular Weight:
Electron Shells:
111
272
Rg Roentgenium
Atomic Weight: [272] 1
Molecular Weight:
Electron Shells:
112
285
Uub Ununbium
Atomic Weight: [285] 1
Molecular Weight:
Electron Shells:
113
284
Uut Ununtium
Atomic Weight: [284] 1
Molecular Weight:
Electron Shells:
114
289
Uuq Ununquadium
Atomic Weight: [289] 1
Molecular Weight:
Electron Shells:
115
288
Uub Ununpentium
Atomic Weight: [288] 1
Molecular Weight:
Electron Shells:
116
292
Uuh Ununhexium
Atomic Weight: [292] 1
Molecular Weight:
Electron Shells:
117
Uus Ununseptium
Atomic Weight: [???] 1
Molecular Weight:
Electron Shells:
118
Uuo Ununoctium
Atomic Weight: [???] 1
Molecular Weight:
Electron Shells:

57
139
La Lanthanium
Atomic Weight: 138.9055(2) 2
Molecular Weight:
Electron Shells:
58
140
Ce Cerium
Atomic Weight: 140.116(1) 2
Molecular Weight:
Electron Shells:
59
141
Pr Praseodymium
Atomic Weight: 140.90765(2)
Molecular Weight:
Electron Shells:
60
144
Nd Neodymium
Atomic Weight: 144.24(3) 2
Molecular Weight:
Electron Shells:
61
145
Pm Promethium
Atomic Weight: [145] 1
Molecular Weight:
Electron Shells:
62
150
Sm Samerium
Atomic Weight: 150.36(3) 2
Molecular Weight:
Electron Shells:
63
152
Eu Europium
Atomic Weight: 151.964(1) 2
Molecular Weight:
Electron Shells:
64
157
Gd Gadolinium
Atomic Weight: 157.25(3) 2
Molecular Weight:
Electron Shells:
65
159
Tb Terbium
Atomic Weight: 158.92534(2)
Molecular Weight:
Electron Shells:
66
163
Dy Dysprosium
Atomic Weight: 162.500(1) 2
Molecular Weight:
Electron Shells:
67
165
Ho Holmium
Atomic Weight: 164.930 32(2)
Molecular Weight:
Electron Shells:
68
167
Er Erbium
Atomic Weight: 167.259(3) 2
Molecular Weight:
Electron Shells:
69
169
Tm Thulium
Atomic Weight: 168.93421(2)
Molecular Weight:
Electron Shells:
70
173
Yb Ytterbium
Atomic Weight: 173.04(3) 2
Molecular Weight:
Electron Shells:
71
175
Lu Lutetium
Atomic Weight: 174.967(1) 2
Molecular Weight:
Electron Shells:
89
227
Ac Actinium
Atomic Weight: [227] 1
Molecular Weight:
Electron Shells:
90
232
Th Thorium
Atomic Weight: 232.0381(1) 1 2
Molecular Weight:
Electron Shells:
91
231
Pa Protactium
Atomic Weight: 231.03588(2) 1
Molecular Weight:
Electron Shells:
92
238
U Uranium
Atomic Weight: 238.02891(3) 1 2 3
Molecular Weight:
Electron Shells:
93
237
Np Neptunium
Atomic Weight: [237] 1
Molecular Weight:
Electron Shells:
94
244
Pu Plutonium
Atomic Weight: [244] 1
Molecular Weight:
Electron Shells:
95
243
Am Americium
Atomic Weight: [243] 1
Molecular Weight:
Electron Shells:
96
247
Cm Curium
Atomic Weight: [247] 1
Molecular Weight:
Electron Shells:
97
247
Bk Berkelium
Atomic Weight: [247] 1
Molecular Weight:
Electron Shells:
98
251
Cf Californium
Atomic Weight: [251] 1
Molecular Weight:
Electron Shells:
99
252
Es Einstienium
Atomic Weight: [252] 1
Molecular Weight:
Electron Shells:
100
257
Fm Fermium
Atomic Weight: [257] 1
Molecular Weight:
Electron Shells:
101
258
Md Mendelevium
Atomic Weight: [258] 1
Molecular Weight:
Electron Shells:
102
259
No Nobelium
Atomic Weight: [259] 1
Molecular Weight:
Electron Shells:
103
262
Lr Lawrencium
Atomic Weight: [262] 1
Molecular Weight:
Electron Shells:

Alkali metals Alkaline earth metals Lanthanides Actinides Transition metals
Poor metals Metalloids Nonmetals Halogens Noble gases

Longlived, Found on earth Short lived, found on earth Man made on earth Predicted (not yet found)

Black atomic numbers are solid at STP
Green atomic numbers are liquid at STP
Red atomic numbers are gases at STP

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