The number of electrons in the valence s...

The number of electrons in the valence shell of calcium is:

A

2

B

4

C

6

D

8

Verified by Experts

The correct Answer is:

A

Calcium has `Z = 20" "therefore" "1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)`
Fourth shell is valence shell, so, 2 electrons are present.

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