Based on molecular orbital theory, the bond order of the Be-Be bond in the Be₂ molecule is ________. A)0 B)1 C)2 D)3 E)4

Question

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The Be2 molecule has 4 electrons. According to molecular orbital theory, these electrons fill the σ1s, σ*1s, σ2s, and σ*2s orbitals. The bond order is calculated as (number of bonding electrons - number of antibonding electrons)/2. For Be2, this is (2 - 2)/2 = 0.

Based on Molecular Orbital Theory, the Bond Order of the Be-Be