Periodic Classification and Periodic Properties - Result Question 15
####12. Identify the least stable ion amongst the following.
(a) $Li^{+}$
(b) $Be^{-}$
(c) $B^{-}$
(d) $C^{-}$
(2002, 3M)
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Answer:
Correct Answer: 12. (b)
Solution:
- $Be^{-}$is the least stable ion, $Be\left(1 s^{2} 2 s^{2}\right)$ has stable electronic configuration, addition of electron decreases stability.
