Question -
Answer -
1. In first transitionseries lower oxidation state is more stable whereas in heavier transitionelements higher oxidation states are more stable.
2. The ionisationenthalpy of 5d transition series is higher than 3d and 4d transition series.
3. M-M bonding is most commonin heavier transition metals but less in first series.
4. The elements of firsttransition series do not form complexes with higher coordination number of 7and 8.
5. The elements of firstseries can form high spin or low spin complexes depending upon strength ofligands but elements of other series form low spin complexes irrespective ofstrength of ligands.