d and f BLOCK ELEMENTS

What factor is highlighted as important for the frequent occurrence of metal-metal bonding in heavy transition metal compounds?

• Lower atomic masses
• Lower melting points
• Greater enthalpies of atomisation
• Higher electronegativity

Which series shows atomic radii that are virtually the same as the corresponding elements in the second series?

• First (3d) series
• Second (4d) series
• Third (5d) series
• All series are the same

What is the consequence of the poor shielding by d electrons across a transition series?

• Net electrostatic attraction decreases
• Net electrostatic attraction remains constant
• Net electrostatic attraction between the nucleus and outer electrons increases
• Atomic radius increases

Which type of electron provides the poorest shielding according to the trends described for transition metals?

• s electron
• p electron
• d electron
• f electron

How does the variation in atomic/ionic radii within a single transition series compare to the variation between different series?

• Variation within a series is very large
• Variation within a series is quite small
• Variation is the same in all cases
• It depends on the specific element