Question

Can anyone tell me the valencies of most important metals and non metals...it's urgent I have my test tomorrow

Answer 1

metals:-

sodium = 1
potassium = 1
calcium=2

non metals:-

chlorine = 1
carbon = 4
silicon = 4
hope it will help you

Answer 2

Answer:

Metals have 1,2 or 3 valence electron while non metals have 4,5,6 or 7 valence electron