Which statements are correct ?
Electrons in motion behave as if they are waves
s-orbital is non-directional
An orbital can accommodate a maximum of two electrons with parallel spins
The energies of the various sub-levels in the same shell of H-atom are in order s > p > d > f
p,d,f orbitals are directional
an orbital should have antiparallel spins
electron can have both particle and wave nature