d and f BLOCK ELEMENTS

Based on the text, what is the primary structural feature of most transition metals at normal temperatures (excluding specific exceptions)?

• They exist as discrete molecules.
• They are amorphous solids.
• They adopt typical metallic crystal structures like bcc, hcp, or ccp.
• They form ionic crystals.

Which of the following is a typical metallic property NOT explicitly mentioned for transition elements in the provided text?

• Ductility
• Malleability
• Paramagnetism
• Metallic lustre

Which element is listed as adopting a hexagonal close-packed (hcp) structure in the 3d series according to the table?

• Vanadium
• Chromium
• Iron
• Scandium

What characteristic distinguishes the bonding in transition metals from that in alkali metals, contributing to properties like high melting points?

• Transition metals have ionic bonding.
• Transition metals have covalent bonding.
• Alkali metals involve more electrons in bonding.
• Greater number of electrons involved in metallic bonding, including d electrons.

Why are transition metals (excluding Zn, Cd, Hg) generally described as 'hard'?

• Due to their large atomic radii.
• Due to the presence of unpaired f electrons.
• Due to the weak interatomic forces in their structures.
• Due to the strong interatomic forces resulting from extensive metallic bonding involving d electrons.