d and f BLOCK ELEMENTS

What is the electronic configuration of the V+ ion?

• [Ar] 3d2 4s2
• [Ar] 3d3
• [Ar] 3d3 4s1
• [Ar] 3d4

Based on Table 4.2, which element has the highest standard electrode potential (E°) for the M3+/M2+ couple listed?

• Iron (Fe)
• Manganese (Mn)
• Cobalt (Co)
• Vanadium (V)

What is the electronic configuration of the Fe+ ion?

• [Ar] 3d5 4s2
• [Ar] 3d6
• [Ar] 3d6 4s1
• [Ar] 3d7

Why is the first ionization enthalpy of Zinc (Zn) significantly higher than that of Copper (Cu)?

• Zinc has a larger atomic radius
• Zinc has fewer protons
• Zinc has a filled 3d subshell, making it harder to remove an electron
• Copper has a higher density

According to Table 4.2, what is the approximate density of Iron (Fe)?

• 7.19 g cm–3
• 7.21 g cm–3
• 7.8 g cm–3
• 8.7 g cm–3