You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
C 2 H 6 O Ethanol CH 3 CH 2 O<br />
Step 1<br />
Find valence e- for all atoms. Add them together.<br />
C: 4 x 2 = 8<br />
H: 1 x 6 = 6<br />
O: 6<br />
Total = 20<br />
Step 2<br />
Find octet e- for each atom and add them together.<br />
C: 8 x 2 = 16<br />
H: 2 x 6 = 12<br />
O: 8<br />
Total = 36<br />
Step 3<br />
Subtract Step 1 total from Step 2.<br />
Gives you bonding e-.<br />
36 – 20 = 16e-<br />
Step 4<br />
Find number of bonds by diving the number in step 3 by 2<br />
(because each bond is made of 2 e-)<br />
16e- / 2 = 8 bond pairs<br />
These can be single, double or triple bonds.<br />
Step 5<br />
Determine which is the central atom<br />
Find the one that is the least electronegative.<br />
Use the periodic table and find the one farthest<br />
away from Fluorine or<br />
The one that only has 1 atom.
Change language