d and f BLOCK ELEMENTS

Which ion listed in Table 4.7 has a calculated spin-only magnetic moment of 2.84 BM?

• V²⁺
• Cr²⁺
• Ni²⁺
• Co²⁺

What is the main source of information for the observed magnetic moments listed in Table 4.7?

• Gas phase atoms
• Free ions in vacuum
• Hydrated ions in solution or in the solid state
• Isolated atoms in gaseous compounds

According to the example calculation provided, what is the calculated spin-only magnetic moment for a divalent ion with atomic number 25?

• 4.90 BM
• 5.3 – 5.5 BM
• 5.92 BM
• 5.96 BM

What is the calculated spin-only magnetic moment for a Co²⁺ ion?

• 2.84 BM
• 3.87 BM
• 4.4 – 5.2 BM
• 4.90 BM

For which of the following electronic configurations (3dⁿ) would the calculated spin-only magnetic moment be zero?

• 3d¹
• 3d⁵
• 3d⁰
• 3d¹⁰