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What is the valence shell electron configuration of the e...

What is the valence shell electron configuration of the element with atomic number 17?

A.

1s² 2s² 2p⁶ 3s² 3p⁴

B.

1s² 2s² 2p⁶ 3s² 3p⁵

C.

2s² 2p⁶

D.

3s² 3p⁵

View answer & explanation

Correct answer is D

It's important to take note of "valence shell" used in the presentation of the question.

Hence; Option D carries the answer as specified in the question.

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