d and f BLOCK ELEMENTS

What does the term 'ductility' mean when describing transition metals?

• The ability to conduct heat.
• The ability to be hammered into thin sheets.
• The ability to resist chemical reactions.
• The ability to be drawn into thin wires.

Which property of transition metals is directly linked to their ability to conduct electricity efficiently?

• Their high melting points
• Their large atomic masses
• The presence of ionic bonds
• The presence of delocalized valence electrons, including those from d orbitals.

How does the presence of unpaired d electrons generally influence the enthalpy of atomisation according to the text's description of Fig. 4.2?

• Completely paired d electrons result in maximum atomisation enthalpy.
• Having no d electrons results in maximum atomisation enthalpy.
• A specific arrangement with one unpaired electron per d orbital contributes to a maximum in atomisation enthalpy.
• Only elements with empty d orbitals have high atomisation enthalpies.

Which of the following 5d transition metals is listed as adopting a cubic close-packed (ccp) structure?

• Hafnium
• Tantalum
• Rhenium
• Platinum

What is the likely reason for the anomalous melting point of Manganese (Mn) compared to the general trend?

• Manganese has a completely filled d orbital.
• Manganese has fewer electrons than the d⁵ element.
• Its specific electronic configuration and bonding characteristics lead to weaker interatomic forces than expected.
• Manganese is a gas at normal temperatures.