shaalaa.com | D and F Block Elements part 15 (Lanthanoids Contraction)
Series 1: playing of 12
- Physical Properties
- Variation in Atomic and Ionic Sizes of Transition Metals
- Ionisation Enthalpies
- Oxidation States
- Trends in the M2+/M Standard Electrode Potentials
- Trends inthe M3+/M2+ Standard Electrode Potentials
- Trends in Stability of Higher Oxidation States
- Chemical Reactivity and Eθ Values
- Magnetic Properties
- Formation of Coloured Ions
- Formation of Complex Compounds
- Catalytic Properties
- Formation of Interstitial Compounds
- Alloy Formation
Account for the following : The E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+ couple.
How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
Which of the following cations are coloured in aqueous solutions and why ?
Sc3+, V3+, Ti4+, Mn2+ (At. Nos. Sc = 21, V = 23, Ti = 22, Mn = 25)
Write down the number of 3d electrons in each of the following ions:
Ti2+, V2+, Cr3+, Mn2+, Fe2+, Fe3+, CO2+, Ni2+ and Cu2+.
Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral).
What can be inferred from the magnetic moment values of the following complex species?
Example Magnetic Moment (BM)