Question

chapter: chemical bonding

what is coordination number in the ionic bond formation?

Answer 1

the number of shared electrons in each atom

Answer 2

Sodium chloride (NaCl) is an example of an ionic solid, which is one formed by a cation (Na+) and an anion (Cl-). In an ionic metal, the coordination number of the cation is equal to the number of anions in close proximity to it. NaCl is a cubic structure, and each sodium cation is surrounded by four chlorine ions on the same plane, as well as one below and one above, so the coordination number is 6. For the same reason, the coordination of each chlorine anion is also 6.