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Step 6<br />
Put the atoms in the structure that you think it will<br />
have and bond them together.<br />
Put Single bonds between atoms.<br />
Step 7<br />
Find the number of nonbonding (lone pairs) e-.<br />
Subtract step 3 number from step 1.<br />
20 – 16 = 4e- = 2 lone pairs<br />
Step 8<br />
Complete the Octet Rule by adding the lone<br />
pairs.<br />
Add any left over bonds to make double or triple<br />
bonds.<br />
Then, if needed, use any lone pairs to make<br />
double or triple bonds so that all atoms meet<br />
the Octet Rule.<br />
See Step 4 for total number of bonds.<br />
Step 9<br />
Find the formal charges for the atoms in the compound.<br />
Arrange atoms so that all formal charges<br />
are as close to 0 as possible.<br />
Some central atoms do not meet the octet rule.<br />
Boron can sometimes have only 6 electrons and<br />
some elements in Periods 3—7 may exceed the<br />
octet rule.<br />
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