d and f BLOCK ELEMENTS

What is the primary reason for the high enthalpy of atomisation in transition metals with many valence electrons?

• Weaker interatomic forces
• Stronger resultant bonding due to more valence electrons
• Lower boiling points
• Decreased stability

Based on the text's discussion of melting points and electron involvement, which configuration would theoretically lead to the strongest metallic bonding in a transition metal?

• A configuration with a completely empty d subshell.
• A configuration with a completely filled d subshell.
• A configuration with a half-filled d subshell contributing optimally to bonding.
• A configuration with only s electrons involved.

What can be inferred about the general packing efficiency of the listed transition metal structures (bcc, hcp, ccp)?

• They are inefficient and loosely packed.
• They only include simple cubic packing.
• They represent efficient ways to pack atoms in a solid, maximizing space utilization.
• Packing efficiency is irrelevant to their properties.

Why is 'metallic lustre' considered a direct consequence of the electronic structure of transition metals?

• Their atoms are arranged in neat rows.
• They are always polished.
• They contain only s electrons.
• The delocalized electrons can absorb and re-emit a wide range of light frequencies.

Which element explicitly listed in the table adopts only a body-centred cubic (bcc) structure?

• Iron
• Titanium
• Vanadium
• Chromium