d and f BLOCK ELEMENTS

Which element in the 3d series exhibits the largest number of oxidation states?

• Scandium
• Titanium
• Manganese
• Zinc

Which element is listed in Table 4.3 as having the +7 oxidation state?

• Manganese (Mn)
• Chromium (Cr)
• Vanadium (V)
• Iron (Fe)

What does the phrase 'The loss of exchange energy increases the stability' imply according to the text?

• It implies that configurations with high exchange energy are more stable
• It implies that losing electrons always increases stability
• It implies that exchange energy is detrimental to stability
• It implies that all configurations have equal stability

What is stated about the exchange energy at the d6 configuration in the text?

• There is no loss of exchange energy at d6 configuration
• There is maximum loss of exchange energy at d6 configuration
• There is minimum loss of exchange energy at d6 configuration
• The d6 configuration is the most stable

What effect does an increase in stability (due to exchange energy) have on the ionisation process according to the text?

• As the stability increases, the ionisation becomes more difficult
• As the stability increases, the ionisation becomes easier
• Stability has no effect on ionisation
• Ionisation always decreases stability