Question

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

1) 6
2) 8
3) 4
4) 2​

Answer 1

Refer to the attachment

Answer 2

Answer:

• The number of electrons in the valence shell of calcium is 2 (option 4).

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Electronic Configuration for Calcium:

• The Electronic configuration of the element Calcium is 2, 8, 8, 2.

• It's valency is 2.

• The element Calcium has 20 protons and 20 neutrons.

What is Electronic Configuration?

• Distribution of electrons in different orbits or shells is called electronic configuration.

• The distribution of electrons into different shells (also called as orbits) of an atom was suggested by Bohr and Bury.

• The atoms of different elements contain different numbers of electrons, protons and neutrons.

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