Question

The third period contains elements. Out of these elements, how many elements are non-metals?

• A. 5
• B. 6
• C. 3
• D. 4

Answer 1

The correct option is D 4

Third period elements has $8$ elements $Na,Mg,Al,Si,P,S,Cl$ and $Ar$. Out of these $Na,Mg,$ and $Al$ are metals, $P,S,Cl$ and $Ar$ are non-metals. Hence answer is option D ($4$).