Use molecular orbital theory to explain why the `Be_(2)` molecules do not exist?

Explanation

`"M.O. energy level configuration for "Be_(2)" molecule is "`
`Be_(2):K K(sigma2s)^(2)(sigma^(**)2s)^(2)" Bond order "=(2-2)/(2)=0`
Since bond order of `Be_(2)` molecule is zero, this means that `Be_(2)` molecule does not exist.