Question

First twenty elements in the periodic table with the atomic number and symbols

Answer 1

hydrogen
helium lithium berilium boron carbon nitrogen oxygen flurine neon sodium magnesium aluminum silicon phosphorus sulphur chlorine argon potassium calcium

Answer 2

Hydrogen H
Helium He
Lithium Li
Beryllium Be
Boron B
Carbon C
Nitrogen N
Oxygen O
Fluorine F
Neon Ne
Sodium Na
Magnesium Mg
Aluminium Al
Silicon Si
Phosphorus P
Sulphur S
Chlorine Cl
Argon Ar
Potassium K
Calcium Ca