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Atomic Structure STB Atomic Structure MCQs (STB)#Atomic Structure #Electronic Configuration

1

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Choose the ground-state electronic configuration of Cl⁻ (Z = 17).

Verified Answer & Explanation⌄

Correct Answer: B) 1s² 2s² 2p⁶ 3s² 3p⁶

Concept Explanation

Chlorine has 17 electrons, and Cl⁻ has gained one more, giving 18 electrons. Its configuration is 1s² 2s² 2p⁶ 3s² 3p⁶.

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