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