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Atomic Structure Valence Electrons

1

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An atom has the electronic configuration: 1s² 2s² 2p⁶ 3s² 3p² How many valence electrons does it contain?

Verified Answer & Explanation⌄

Correct Answer: D) 4

Concept Explanation

The outermost shell is n = 3: 3s² 3p² Valence electrons = 2 + 2 = 4.

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