Molecular orbital theory was developed mainly by

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : $N _2: N _2^{+} ; O _2 ; O _2^{+}$?

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals

$A$. have the same energy

$B$. have the minimum overlap

$C$. have same symmetry about the molecular axis

$D$. have different symmetry about the molecular axis

Choose the most appropriate from the options given below:

What is $\mathrm{LCAO}$ ? Explain .

Explain $\mathrm{H}_{2}$ molecule by molecular orbitals theory.

Which of the following is not paramagnetic