# easy trick to find bond order in seconds

if you are looking for the trick to find the bond order for competitive exams like iit and jee you are at the right place:

to find bond order easily you have to remember

that a molecule with 14 electrons have bond order 3...thats it

remember this below as well

*with increase in or decrease in number of electrons by 2 than bond order will decrease by 1 *

wait let me explain it to you

by an example

now watch this video below for detailed explanation

example a species having total 14 electrons than its must have

a bond order of 3 if we decrease the number of electrons by 2 that is

12 electrons the bond order decreases to 2

so 10 electron species have bond order 1

look the table

SPECIES TOTAL electrons BOND order

10 1

11 1.5

12 2

13 2.5

14 3

15 2.5

16 2

......................

for species less than 10 electrons

have to follow

B A B A where b stands for the bonding molecular orbital and A stands for antibonding molecular orbital

as we know the formula for bond order is 1/2{number of electrons in bonding molecular orbital-number of electrons in antibonding molecular orbitals}

so if we say for 6 electron

B A B A

2 2 2

WE FILL ELECTRONS IN THE number of two in each so we apply the formula 1/2{4-2} = 1 so bond order is 1

by this method you can easily find the bond order in the competitive exams like neet,aiims and iit jee and other exams

some examples:

Q:how to find bond order of O2 ?

Ans:the O2 has total 16 electrons so

as we know that the the 14 electron species will have the bond order of 3 so with increase in or decrease in electrons by 2 the

the bond order will decrease by 1 so this has bond order of 2.

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