3-Orbitals of the same sub level are equal
in energy and shape.
= py = pz
4-No of orbitals in each E. level = square
order of E. level = n2.
Q. No (ms):
the direction in which the electron spins around its axis during its rotation
around the nucleus.
·Each orbital can be saturated by 2 electrons, one
electron spins around its axis clockwise while the other electron spins anti –
clockwise in order to from 2 opposite magnetic fields to decrease the force of
repulsion between them which keep the atom stable.
has only two possible values + 1/2 – 1/2
Give reason: Each orbital carries 2
electrons although they are negatively charged.
Summary of the relationship between the principle E.L,
sub levels orbitals and no of electrons:
1-No of energy sublevels = order of
principle level (n).
2-No of orbitals within a principle level
= square the no of the level (n2).
3-No of electrons occupying a given E.
level = two times the square order of this