1. Count Valence Electrons:
* Carbon (C): 4 valence electrons
* Hydrogen (H): 1 valence electron each (2 total)
* Oxygen (O): 6 valence electrons
Total Valence Electrons = 4 + 2 + 6 = 12
2. Draw the Structure:
* Central Atom: Carbon is the least electronegative and usually goes in the center.
* Single Bonds: Connect the hydrogens and oxygen to the carbon with single bonds.
* Remaining Electrons: Place the remaining electrons around the oxygen to complete its octet.
3. Lewis Dot Structure:
```
H
|
C
/ \
O H
..
```
In the Lewis dot structure of formaldehyde, you should show a total of 12 electrons.
