Which statement about coordination number of a cation is true?

Options

A. Most metal ions exhibit only a single characteristic coordination number
B. The coordination number is equal to the number of ligands bonded to the metal atom
C. The coordination number is determined solely by the tendency to surround the metal atom with the same number of electrons as one of the rare gases.
D. For most cations, the coordination number depends on the size, structure and charge of the liagands.

Answer

B, D