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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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