Question

Elements name and their atomic numbers upto 20

Answer 1

1.Hydrogen,
2.Helium,
3.Lithum,
4.Berilium,
5.Boron,
6.Carbon,
7.Nitrogen,
8.Oxygen,
9.Flourine,
10.Neon,
11.Sodium,
12.Magnesium,
13.Aluminium,
14.Silicon,
15.Phosphorous,
16.Sulphur,
17.Chlorine,
18.Argon,
19.potassium,
20.Calsium.