1
1
1
2
Atomic #
3
4
C Solid
5
6
7
8
Metals
9
10
11
Nonmetals
12
13
14
15
16
17
2
18
2 K
1 H
3
Symbol
Name Atomic Mass
2 1
He
Helium 4.002602
Hydrogen 1.00794
Alkali metals
Alkaline earth metals
Transition metals
Poor metals
Other nonmetals
Noble gases
4
2 2
2 Li
11
Be
Beryllium 9.012182
2 8 1
Hg Liquid H Gas
Lanthanoids Actinoids
5
2 3
6
2 4
7
2 5
8
2 6
9
2 7
10
2 8
K L
B
Boron 10.811
C
Carbon 12.0107
2 8 3
N
Nitrogen 14.0067
2 8 4
O
Oxygen 15.9994
2 8 5
F
Fluorine 18.9984032
2 8 6
Ne
Neon 20.1797
2 8 7
Lithium 6.941
12
3 Na
19
Mg
Magnesium 24.3050
2 8 2
Rf Unknown
21
2 8 9 2
13
14
15
16
17
18
Al
Aluminium 26.9815386
2 8 18 2
Si
Silicon 28.0855
P
Phosphorus 30.973762
S
Sulfur 32.065
Cl
Chlorine 35.453
Ar
Argon 39.948
2 8 8
K L M
Sodium 22.98976928
2 8 8 1
20
4 K
Ca
Calcium 40.078
2 8 8 2
22
Sc
Scandium 44.955912
Ti
Titanium 47.867
2 8 10 2
23
V
Vanadium 50.9415
2 8 11 2
24
Cr
Chromium 51.9961
2 8 13 1
25
Mn
Manganese 54.938045
2 8 13 2
26
Fe
Iron 55.845
2 8 14 2
27
Co
Cobalt 58.933195
2 8 15 2
28
Ni
Nickel 58.6934
2 8 16 2
29
Cu
Copper 63.546
2 8 18 1
30
31
Zn
Zinc 65.38
Ga
Gallium 69.723
2 8 18 3
32
Ge
Germanium 72.64
2 8 18 4
33
As
Arsenic 74.92160
2 8 18 5
34
Se
Selenium 78.96
2 8 18 6
35
Br
Bromine 79.904
2 8 18 7
36
Kr
Krypton 83.798
2 8 18 8
K L M N
Potassium 39.0983
37
5 Rb
55
2 8 18 8 1
38
Sr
Strontium 87.62
2 8 18 8 2
39
Y
Yttrium 88.90585
2 8 18 9 2
40
Zr
Zirconium 91.224
2 8 18 10 2
41
Nb
Niobium 92.90638
2 8 18 12 1
42
Mo
Molybdenum 95.96
2 8 18