d and f BLOCK ELEMENTS Quiz

• Its low ionisation enthalpies
• Its high melting point
• Its metallic bonding
• The attainment of the stable, filled d10 electron configuration

• Fe2+ is larger than Fe3+
• Fe3+ is more hydrated than Fe2+
• Fe2+ (d6) is relatively stable, making its oxidation to Fe3+ (d5) favorable
• Fe3+ (d5) is relatively stable, making its reduction to Fe2+ (d6) favorable

• A more positive E°(M3+/M2+) indicates the M2+ state is more stable relative to M3+
• There is no relationship
• Stability cannot be determined from E° values
• A more negative E°(M3+/M2+) indicates the M2+ state is more stable relative to M3+

• Because they are large ions
• Because they form precipitates
• Because they have high charge densities
• Due to d-d transitions absorbing visible light

• They are highly reactive metals
• They have high melting points
• They are good conductors of electricity
• Their ability to adopt multiple oxidation states and form complexes