Q. The coordination number of a central metal atom in a complex is determined by
A) The number of ligands around a metal ion bonded by $\sigma -$ bonds
B) The number of ligands around a metal ion bonded by $\pi -$bonds
C) The number of ligands around a metal ion bonded by $\sigma$ –and $\pi -$ bonds both
D) The number of only anionic ligands bonded to the metal ion
Explanation
(a)
Coordination number is the maximum covalency shown by a metal or metal ion. It is the maximum number of ligands attached to metal by sigma bonds or coordinate bonds.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.