d and f BLOCK ELEMENTS Quiz

• Large atomic sizes
• High radioactivity
• The filling of inner (n-2)f or (n-3)f orbitals rather than outer valence orbitals
• Gaseous state

• d electrons are easier to remove than s electrons
• d electrons are harder to remove than p electrons
• d electrons are not as tightly held as outermost s/p electrons but more so than next shell electrons
• All d electrons are equivalent in energy

• Maximum atomic mass in the middle
• Maximum ionic charge in the middle
• Optimal number of unpaired d electrons for strong bonding
• Decreasing atomic radii across the series

• Homogeneous catalyst
• Enzymatic catalyst
• Heterogeneous catalyst
• Acid-base catalyst

• They are always basic
• They are always acidic
• They can react with both H+ and OH- ions due to their amphoteric nature
• They are neutral oxides