d and f BLOCK ELEMENTS

Based on the information, which statement best describes the relationship between the number of valence electrons and the strength of metallic bonding in transition metals?

• Only s electrons contribute to bonding strength.
• Fewer electrons lead to stronger bonding.
• Only d electrons contribute to bonding strength.
• More delocalized electrons (from both d and s orbitals) generally lead to stronger bonding.

Which transition metal listed is known for its exceptional ability to be drawn into very fine wires (high ductility)?

• Mercury
• Zinc
• Iron
• Platinum

What property of transition metals allows them to be shaped into thin sheets (malleability)?

• The presence of ionic bonds.
• The rigidity of covalent bonds.
• The directional nature of metallic bonds.
• The non-directional nature of metallic bonding allows atomic layers to slide.

Considering the electronic configurations and the general trend, which 5d element would likely have the highest melting point based on the d⁵ rule (excluding anomalies)?

• Tungsten
• Osmium
• Iridium
• Rhenium

What does the symbol 'X' likely represent for Mn and Cd in the lattice structures table?

• A radioactive structure.
• A face-centred cubic structure.
• A simple cubic structure.
• An atypical or complex structure compared to the standard metallic types.