1
H, Hydrogen
2
He, Helium
3
Li, Lithium
4
Be, Beryllium
5
B, Boron
6
C, Carbon
7
N, Nitrogen
8
O, Oxygen
9
F, Fluorine
10
Ne, Neon
11
Na, Sodium
12
Mg, Magnesium
13
Al, Aluminum
14
Si, Silicon
15
P, Phosphorus
16
S, Sulfur
17
Cl, Chlorine
18
Ar, Argon
19
K, Potassium
20
Ca, Calcium
21
Sc, Scandium
22
Ti, Titanium
23
V, Vanadium
24
Cr, Chromium