Question

Valence electrons of first 20 elements

Answer 1

Answer:

Hydrogen-1

helium-2

lithium-1

beryllium-2

boron-3

carbon-4

nitrogen-5

oxygen-6

fluroine-7

neon-8

sodium-1

magnesium-2

aluminium-3

silicon-4

phosphorus-5

sulphur-6

chlorine-7

argon-8

potassium-1

calcium-2