Q. An element $X$ which occurs in the first short period has an outer electronic structure $s^{2}p^{1}$. What are the formula and acid-base character of its oxides?
A) $XO_{3},$ basic
B) $X_{2}O_{3}$, basic
C) $X_{2}O_{3},\$amphoteric
D) $XO_{2},\$acidic
Explanation
(c)
The outer electronic configuration $= s^{2}p^{1}$
Thus, valency $= 2 + 1 = 3$
Therefore, the formula of the oxide is $X_{2}O_{3}$
Since, it is an oxide of III group element, its nature is amphoteric
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.