Question

Identify the least stable ion amongst the following.

• A. $L{i}^{+}$
• B. $B{e}^{-}$
• C. $B^{-}$
• D. $C^{-}$

Answer 1

Answer: (B)

$B{e}^{-}$ is the least stable ion. $Be(I{s}^{2}2s^2)$ has stable electronic configuration, addition of electron decreases stability.