Question

The elements of the third period of the Periodic Table are 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

(A) 's' is a metallic or 'cl' is a hologens
(B) cl is a higher atomic mass

Answer 2

a.S is metallic
b. Cl has higher atomic mass that is 35.5
and Al has 27..