d and f BLOCK ELEMENTS

What is the electronic configuration of the Ti+ ion?

• [Ar] 3d1 4s2
• [Ar] 3d2
• [Ar] 3d2 4s1
• [Ar] 3d3

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

• Titanium (Ti)
• Vanadium (V)
• Scandium (Sc)
• Zinc (Zn)

What is the electronic configuration of the Co+ ion?

• [Ar] 3d6 4s2
• [Ar] 3d7
• [Ar] 3d7 4s1
• [Ar] 3d8

Why does the enthalpy of atomisation for Manganese (Mn) differ significantly from its neighbors?

• It has a larger atomic radius
• It is less dense
• Its half-filled d5 configuration provides less contribution to metallic bonding
• It has a higher ionization enthalpy

According to Table 4.2, what is the approximate ionic radius of Cr2+?

• 79 pm
• 82 pm
• 77 pm
• 65 pm