According to molecular orbital theory,

Question:

According to molecular orbital theory, the species among the following that does not exist is:

  1. $\mathrm{He}_{2}^{-}$

  2. $\mathrm{He}_{22}^{+}$

  3. $\mathrm{O}_{2}^{2-}$

  4. $\mathrm{Be}_{2}$


Correct Option: , 4

Solution:

B. O. of $B e_{2}$ is zero, So it does not exist.

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