20 first Elements of the Periodic Table 😉

Aluminum

Element Symbol: Al Atomic Number: 13 Atomic Mass unit: 26.982

Argon

Element Symbol: Ar Atomic Number: 18 Atomic mass unit: 39.948

Boron

Element Symbol: B Atomic Number: 5 Atomic mass unit: 10.811

Beryllium

Element Symbol: Be Atomic Number: 4 Atomic mass unit: 9.0122

Carbon

Element Symbol: C Atomic Number: 6 Atomic mass unit: 12.011

Calcium

Element Symbol: Ca Atomic Number: 20 Atomic mass unit: 40.078

Chlorine

Element Symbol: Cl Atomic Number: 17 Atomic mass unit: 35.453

Fluorine

Element Symbol: F Atomic Number: 9 Atomic mass unit: 18.999

Potassium

Element Symbol: K Atomic Number: 19 Atomic mass unit: 39.098

Magnesium

Element Symbol: Mg Atomic Number: 12 Atomic mass unit: 24.305

Nitrogen

Element Symbol: N Atomic Number: 7 Atomic mass unit: 14.007

Sodium

Element Symbol: Na Atomic Number: 11 Atomic mass unit: 22.990

Neon

Element Symbol: Ne Atomic Number: 10 Atomic mass unit: 20.180

Oxygen

Element Symbol: O Atomic Number: 8 Atomic mass unit: 15.999

Phosphorus

Element Symbol: P Atomic Number: 15 Atomic mass unit: 30.947

Sulphur

Element Symbol: S Atomic Number: 16 Atomic mass unit: 32.065

Silicon

Element Symbol: Si Atomic Number: 14 Atomic mass unit: 28.086

Hydrogen

Element symbol: H Atomic Number: 1 Atomic mass unit: 1.0079

Helium

Element symbol: He Atomic Number: 2 Atomic mass unit: 4.0026

Lithium

Element symbol: Li Atomic Number: 3 Atomic mass unit: 6.941