Question

The elements of the third period of the Periodic Table are given below: Group → I II III IV V VI Vii Period ↓ 3 Na Mg Al Si P S Cl (a) Which is more non – metallic, S or Cl? (b) Which has higher atomic mass, Al or Cl?

Answer 1

Answer:

a) chlorine

b) chlorine

Explanation:

a) metallic character decreases across the period and non metallic character increases  

hence chlorine is more non metallic in nature

b) atomic mass increases across the period because of addition of protons in the nucleus

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