d and f BLOCK ELEMENTS

Why is the ionisation enthalpy of Fe2+ lower than that of Mn2+ according to the text?

• Fe2+ has a d6 configuration while Mn2+ has a d5 configuration, making Fe2+ easier to ionise
• Mn2+ has a more stable configuration than Fe2+
• Fe2+ has a higher nuclear charge
• Mn2+ has a lower effective nuclear charge

Why is the ionisation enthalpy of Mn+ lower than that of Cr+ according to the text?

• Mn+ has a 3d54s1 configuration while Cr+ has a d5 configuration, making Mn+ easier to ionise
• Cr+ has a more stable configuration than Mn+
• Mn+ has a higher nuclear charge
• Cr+ has a lower effective nuclear charge

Which element in the first row of transition metals is noted for exhibiting the widest range of oxidation states from +2 to +7?

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

What is the highest oxidation state listed for Iron (Fe) in Table 4.3?

• +6
• +7
• +5
• +4

What is the most common oxidation state for Zinc (Zn) based on Table 4.3?

• +2
• +1
• 0
• +3