d and f BLOCK ELEMENTS

Which electronic configuration would most likely result in a coloured ion?

• 3d0
• 3d10
• 3d5 (high spin)
• 3d4

What role do ligands play in the colour of transition metal complexes?

• They provide the electrons for colour
• They prevent d-d transitions
• They split the d-orbitals, creating energy gaps for d-d transitions
• They change the nuclear charge

What is the relationship between the colour observed and the light absorbed by a transition metal ion?

• The observed colour is the same as the light absorbed
• The observed colour is unrelated to the light absorbed
• The observed colour is the complementary colour of the light absorbed
• The observed colour is always blue

What determines the specific colour observed for a transition metal ion in aqueous solution?

• The total number of electrons
• The atomic mass of the metal
• The energy gap between split d-orbitals
• The charge on the ion

What causes the colour in transition metal ions in aqueous solution?

• s-p electronic transitions
• p-d electronic transitions
• d-d electronic transitions
• f-f electronic transitions