H
1, hydrogen
He
2, helium
Li
3, lithium
Be
4, beryllium
B
5, boron
C
6, carbon
N
7, nitrogen
O
8, oxygen
F
9, fluorine
Ne
10, neon
Na
11, sodium
Mg
12, magnesium
Al
13, aluminum
Si
14, silicon
P
15, phosphorus
S
16, sulphur
Cl
17, chlorine
Ar
18, argon
K
19, potassium
Ca
20, calcium
Sc
21, scandium
Ti
22, titanium
V
23, vanadium
Cr
24, chromium