The following ions have the same electron configuration except 

\(_{8}\)O, \(_{12}\)Mg, \(_{13}\)AI, \(_{17}\)CI

a

CI\(^{-}\)

b

O\(^{2-}\)

c

Mg\(^{2+}\)

d

AI\(^{3+}\)

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Correct Option
a

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Discussions (2)

Hdjdys
1 year ago

the answer should be B

Boluwa124456
2 months ago

Now calculate electrons in each ion:
O²⁻ → 8 + 2 = 10 electrons
Mg²⁺ → 12 − 2 = 10 electrons
Al³⁺ → 13 − 3 = 10 electrons
Cl⁻ → 17 + 1 = 18 electrons

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