d and f BLOCK ELEMENTS Quiz

• It leads to weaker metallic bonds and lower melting points
• It leads to stronger metallic bonds and consequently higher melting points
• It has no effect on melting points
• It makes the metals more volatile

• They decrease across the series
• They generally increase with atomic number, with a break at the element forming a d5 ion
• They remain constant across the series
• They show no discernible trend

• Electrons are added to the same shell
• Effective nuclear charge increases slowly due to shielding by (n-1)d electrons
• The nuclear charge remains constant
• Electrons occupy higher energy levels

• The atomic mass
• The number of unpaired electrons available for delocalisation
• The nuclear charge
• The atomic radius

• They have low ionisation enthalpies
• Due to the small energy difference between the (n-1)d and ns orbitals
• They have high electronegativity
• They readily gain electrons