Q. The elements $X,\ Y,\ Z$ and $T$ have the indicated electronic configuration. Starting with the innermost shell, which is the most metallic element?
A) $X = 2,\ 8,\ 4$
B) $Y = 2,\ 8,\ 8$
C) $Z = 2,\ 8,\ 8,\ 1$
D) $T = 2,\ 8,\ 8,\ 7$
Explanation
(c)
$Z = 2,\ 8,\ 8,\ 1$. Because it would donate $e^{-}$ more easily
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.