d and f BLOCK ELEMENTS

Which property of transition metals is influenced by the enthalpy of atomisation, according to the text?

• Melting point
• Density
• Standard electrode potential
• Colour

What is the relationship between the strength of bonding and the enthalpy of atomisation?

• Stronger bonding results in lower enthalpy of atomisation
• Stronger bonding results in higher enthalpy of atomisation
• There is no relationship
• It depends on the type of bond

Which of the following best explains why the 5d series elements do not show a significant increase in atomic radius compared to the 4d series?

• 5d electrons shield more effectively than 4d electrons
• Lanthanoid contraction offsets the expected size increase
• 5d electrons are held less tightly
• The nuclear charge decreases significantly

What is the primary reason for the relatively small variation in atomic/ionic radii within a single transition series?

• All elements have the same number of electron shells
• The number of electrons added and removed is roughly balanced by the increasing nuclear charge and poor d shielding
• The electrons are added to the outermost shell
• The nuclear charge remains constant

Which of the following elements would you expect to have the highest enthalpy of atomisation based on the information provided?

• An element in the first transition series with few valence electrons
• An element in the second transition series with few valence electrons
• An element in the first transition series with many valence electrons
• An element in the third transition series with many valence electrons