Question

An element R forms the highest oxide $R_2{O}_5$. The element R belongs to:

• A. group $14$
• B. group $15$
• C. group $16$
• D. group $17$

Answer 1

The correct option is B group $15$

since element from the oxide of type$R_2{O}_5$.it shows that R has alency of S.so,it must be a group 15 element which has $5e^{-}s$ in its valence shell