Q. The maximum valency of an element with atomic number 7 is
A) 2
B) 3
C) 4
D) 5
Explanation
(d)
Valency is according to valence shell configuration which here is $1s^{2},\ 2s^{2},\ 2p^{3},\ ie,\ 5$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.