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Isoelectronic Species

The number of...

Question

The number of atoms touching a particular atom in a crystal is called its:

A

valency

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B

co-ordination number

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C

lattice parameter

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D

atomic packing factor

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Solution

The correct option is B co-ordination number
Co-ordination number of a central atom in a molecule or crystal is the number of its near neighbours or the number of atoms touching a particular atom in a crystal.
Example: Co-ordination number of Na atom in NaCl is $6$ .

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