How many of the following species are paramagnetic?

O₂²⁻, O₂⁺, O₂, N₂, B₂, CO, NO, monomer of N₂O₄, monomer of B₂H₆, monomer of Al₂Cl₆, CuSO₄·5H₂O

Question

How many of the following species are paramagnetic? O₂²⁻, O₂⁺, O₂, N₂, B₂, CO, NO, monomer of N₂O₄, monomer of B₂H₆, monomer of Al₂Cl₆, CuSO₄·5H₂O

TestHub · Accepted Answer

To determine if a species is paramagnetic, we examine its molecular orbital (MO) diagram for unpaired electrons.

Paramagnetic species: O₂⁺, O₂, B₂, NO, monomer of N₂O₄ (NO₂), CuSO₄·5H₂O (due to Cu²⁺).

Diamagnetic species: O₂²⁻, N₂, CO, monomer of B₂H₆ (BH₃), monomer of Al₂Cl₆ (AlCl₃).

Thus, 6 species are paramagnetic.

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