TOTAL NUMBER OF ELECTRONS:
10 11 12 13 14 15 16 17 18
1 1.5 2 2.5 3 2.5 2 1.5 1 <--- BOND ORDER
D P P P D P P P D
D ----> Dimagnetic
P------> Paramagnetic
the bond order calculated by the formula will always give you the correct answer.
but as for the magnetic nature...90% will be correct....
their are some exceptions like B2
both are paramagnetic
hope this article helps you...
do comment...
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UP 0 DOWN 0 1 1