Order of energy of orbitals : The energy order of orbitals of multi- electron atoms in ground - state is shown in following diagram in it the subsidiary quantum number (l ) is change then energy of orbital also change
Thus energy order of orbitals also change
Thus energy order of orbitals
`1s lt 2s lt 3s lt 3p lt 4s lt 3d `
`lt 4p lt 5s lt 4d lt 5p lt 6s lt 4f lt`
order of energy
In H 2s = 2p
in other 2 s `lt` 2p and energy of 2s in H `lt `
energy of 2s of other etc
factors of affecting the energy of orbitals :
(i) The attraction of orbital towards the nucleus (ii) The shielding amount of outer shell to electron of inner shell orbital (ii) the ammount of effective nuclear charge on outer shell orbital (v ) The distance of nucleus to outer shell is depends on the value of l in orbital.
Shielding : The electrons in inner shell between nucleus and outer shell electron drecease the effect of positive charge of nucleus on outer complete attraction of nucleus . this effect is called shielding .
shielding means decrease in positive charge of nucleus on outer electron by inner shell electron.
