Metal-metal bonding is more frequent in or series than in series due to :
CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry
Problem
Metal-metal bonding is more frequent in 4d or 5d series than in 3d series due to :
(1) their greater enthalpies of atomisation
(2) the large size of the orbitals which participates in the metal-metal bond formation
(3) their ability to involve both ns and (n−1)d electrons in the bond formation
(4) the comparable size of 4d and 5d series elements