Question

Use molecular orbital theory to explain why the Be2 molecule does not exist.​

Answer 1

Answer:

The electronic configuration of Beryllium is 1s2 2s2. From the electronic configuration it is clear that there is no singly filled atomic orbital present in beryllium. Without the half filled orbital,the overlapping is not possible ,therefore Be2 molecule does not exist.

Answer 2

Answer:

Be  2  molecule has MO electronic configuration KK(σs)  2 (σ  ∗ 2s)².

This means, that the bond order of it will be $\frac{2-2}{2}$ = $\frac{0}{2}$ = 0

A Zero bond order is not possible here and this means that the Be2 Molecule does not exist.

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