H-
1
1.008 amu
Gas
Hydrogen
He
2
4.003 amu
Gas
Helium
Li+
3
6.941 amu
Solid
Lithium
Be2+
4
9.012 amu
Solid
Beryllium
B
5
10.81 amu
Solid
Boron
C
6
12.01 amu
Solid
Carbon
N3-
7
14.01 amu
Gas
Nitrogen
O2-
8
16.00 amu
gas
Oxygen
F-
9
19.00
Gas
Fluorine
Ne
10
20.18 amu
gas
Neon
Na+
11
22.99 amu
solid
Sodium
Mg2+
12
24.31 amu
solid
Magnesium
Al3+
13
26.98 amu
Solid
Aluminum
Si
14
28.09 amu
Solid
Silicon
P
15
30.97 amu
solid
Phosphorus
S2-
16
32.07 amu
Solid
Sulfur
Cl-
17
35.45 amu
gas
Chlorine
Ar
18
39.95 amu
gas
argon
K+
19
39.10 amu
solid
Potassium
Ca<span>2+</span>
20
40.08 amu
solid
Calcium
Sc
21
44.96 amu
solid
Scandium
Ti
22
47.87 amu
solid
Titanium
V
23
50.94 amu
solid
Vanadium
Cr3+
24
52.00 amu
solid
Chromium (III) or Chromic