Question

What is the two dimensional coordination number of a molecule in square close packing layer?

Answer 1

Answer:

4

Explanation:

The number of spheres which are touching a given sphere is called the coordination number. In square close-packed layer, a molecule is in contact with four of its neighbours. Therefore, the two-dimensional coordination number of a molecule in square close-packed layer is 4.

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Answer 2

Answer:

A molecule in a square close-packed layer touches four of its neighbours. Thus, its two-dimensional coordination number is 4.