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1.Total no.of molecular orbitals formed in a molecular species is equal to total no.of atomic orbitals involved in their formation.
2.In homo nuclear diatomic molecular species ever numbered Mos are formed.Among these Mo half of 'MOS' are bonding nature and remaining half will be of antibonding nature.
However,in netronuclear molecular species bonding mo and anti bonding mo and non-bonding mo are formed.
3.Gerade and ungerade symm. terms are used for mos formed in homonuclear species.They are not used for netro nuclear.
Order Of Energy Levels:
Of various molecular orbitals of molecules having total no.of protons up to 14 or nature diatomic molecules having total no.of e-up to 14.
=This order of energy levels of mos is applicable to homo nuclear diatomic molecular like B2,C2,N2 and their charged species.
=It is also applicable to hetronuclear diatomic molecules BN,CN,HF,CO and their charged
species.
=Order of energy levels of various mos of molecules having total no.of protones beyond 14 or neutral molecules having total no. of e greater than 14.
=I.e this order of energy levels of mos is applicable for O2,F2,Ne2,NO, of and their charged species.
=It is also applicable for H2,He2,HH2,Li2,Be2.
=It is also applicable for O2,NO but not applicable for N2,CN2.
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