Question

An element X occurs in short period having configuration ${ns}^2{np}^1$. the formula and nature of its oxide is :

• A. ${XO}_{3,}basic$
• B. ${XO}_{3,}bcidic$
• C. $X_2{O}_{3,}amphoteric$
• D. $X_2{O}_{3,}basic$

Answer 1

The correct option is D $X_2{O}_{3,}basic$

Explanation: We are given an element having electronic configuration as ns²np¹, which means that the valency of element X is 3.

We know that the valency of Oxide ion is 2.

Hence, the formula becomes X₂O₃

From the electronic configuration, it is visible that the element belongs to the 3rd group of periodic table and is a metal.

The oxide formed from a metal is a basic oxide.