Question

what is coordination number ?​

Answer 1

Answer:

the number of atoms or ions immediately surrounding a central atom in a complex or crystal.

Explanation:

Coordination number, also called Ligancy, the number of atoms, ions, or molecules that a central atom or ion holds as its nearest neighbours in a complex or coordination compound or in a crystal. ... Coordination numbers from 2 to 9 have been observed in complexes; higher coordination numbers occur, although rarely.

Answer 2

Explanation:

the number of atoms or ions immediately surrounding a central atom in a complex or crystal.