d and f BLOCK ELEMENTS

What is the primary reason transition metals generally exhibit high tensile strength?

• They have low atomic masses.
• They form weak van der Waals forces.
• They contain only s electrons in their bonding.
• Extensive metallic bonding involving d and s electrons creates strong interatomic forces.

Based on the information about lattice structures, what can be inferred about the general packing efficiency of transition metal structures?

• They primarily adopt inefficient simple cubic structures.
• They adopt structures with low packing efficiency like body-centred cubic.
• They tend to adopt highly efficient close-packed structures like hcp and ccp.
• Packing efficiency is not a significant factor in transition metal structures.

Which element listed in the 3d series table adopts a cubic close-packed (ccp) structure?

• Vanadium
• Chromium
• Iron
• Nickel

According to the text, what is a key characteristic of the bonding in transition metals that differentiates them from main group metals regarding melting points?

• Transition metals form ionic bonds.
• Transition metals form covalent bonds.
• Main group metals have lower atomic numbers.
• Greater involvement of inner d-shell electrons leading to stronger bonds.

What is the primary reason transition metals are generally good conductors of heat?

• Their large atomic masses facilitate heat transfer.
• Their ionic nature allows for easy energy transfer.
• Their tightly bound electrons vibrate strongly.
• The delocalized electrons can transfer kinetic energy efficiently throughout the lattice.