d and f BLOCK ELEMENTS

What is the electronic configuration of the Zn+ ion?

• [Ar] 3d10
• [Ar] 3d9 4s2
• [Ar] 3d10 4s1
• [Ar] 3d9 4s1

Based on Table 4.2, which element has a positive standard electrode potential (E°) for the M2+/M couple?

• Zinc (Zn)
• Iron (Fe)
• Copper (Cu)
• Nickel (Ni)

What is the electronic configuration of the Cu+ ion?

• [Ar] 3d9 4s1
• [Ar] 3d10 4s1
• [Ar] 3d10
• [Ar] 3d9

Why is the lanthanoid contraction a significant factor in the chemistry of heavier elements?

• It increases the reactivity of lanthanides
• It makes lanthanides more metallic
• It causes elements in the second and third transition series to have very similar properties
• It decreases the density of all elements

According to Table 4.2, what is the approximate ionic radius of Co2+?

• 77 pm
• 74 pm
• 70 pm
• 75 pm