d and f BLOCK ELEMENTS Quiz

• Standard electrode potential
• Boiling point
• Melting point
• Noble character in reactions

• It means all elements in a series have identical radii
• It indicates that changes in radius across a series are modest despite other changing factors
• It suggests that nuclear charge remains constant
• It implies that d electrons provide excellent shielding

• Filling of 5d orbitals before 4f orbitals
• Filling of 4f orbitals before 5d orbitals
• Filling of 3d orbitals before 4f orbitals
• Filling of 4p orbitals before 4f orbitals

• The radii of 5d elements become much larger than 4d elements
• The radii of 5d elements become much smaller than 4d elements
• The radii of 5d elements become nearly equal to 4d elements
• The radii follow no predictable pattern

• Weaker interatomic forces
• Stronger resultant bonding requires more energy to break
• Lower boiling points
• Decreased stability