In hydrogen atom, energy of first excited state is $$-$$ 3.4 eV. Then find out K.E. of same orbit of hydrogen atom

Main axis of a diatomic molecule is z, molecular orbital p_x and p_y overlap to from which of the following orbitals.

The following quantum numbers are possible for how many orbitals :

n = 3, $$l$$ = 2, m = +2 ?

For given energy, E = 3.03 $$ \times $$ 10^$$-$$19 Joules corresponding wavelength is (h = 6.626 $$ \times $$ 10^$$-$$34 J sec, c = 3 $$ \times $$ 10⁸ m/sec)