When two atomic orbitals combine they form
One molecular orbital
Two molecular orbital
Three molecular orbital
Four molecular orbital
(b) One bonding $M.O.$ and one anti-bonding $M.O.$
The bond length the species ${O_2},O_2^ + $ and $O_2^ – $ are in the order of
The total number of species from the following in which one unpaired electron is present, is . . . . . . $\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$
The bond order and magnetic property of acetylide ion are same as that of $……..$.
Use molecular orbital theory to explain why the $\mathrm{Be}_{2}$ Molecule does not exist.
Which of the following is not paramagnetic
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