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Hund's Rule

If only 2 hex...

Question

If only 2 hexagonal layers are kept completely each one over other (AA type stacking). Find the coordination number of any atom present in a layer.

A

12

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B

8

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C

7

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D

4

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Solution

The correct option is B $8$
The centre atom is surrounded by six atom and one atom lies over this therefore $C . N . = 7$ .

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