1. Determine the Valence Electrons
* Carbon (C): 4 valence electrons
* Oxygen (O): 6 valence electrons
* Chlorine (Cl): 7 valence electrons each (total of 14 for two chlorine atoms)
2. Arrange the Atoms
* Carbon is the central atom because it is the least electronegative.
* Oxygen is double-bonded to carbon.
* The two chlorine atoms are single-bonded to carbon.
3. Draw the Bonds and Lone Pairs
* Use lines to represent the bonds between atoms.
* Fill in the remaining valence electrons as lone pairs around the oxygen and chlorine atoms.
Here's the dot and cross diagram:
```
..
:O:
||
C
/ \
:Cl: :Cl:
..
```
Explanation:
* Carbon: Has four valence electrons, all of which are used in bonding (two with oxygen and one with each chlorine).
* Oxygen: Has six valence electrons. Two are used in the double bond with carbon, and the remaining four are present as two lone pairs.
* Chlorine: Each chlorine has seven valence electrons. One is used in the single bond with carbon, and the remaining six are present as three lone pairs.
Key Points:
* The diagram shows the shared electrons (bonds) as lines.
* Each line represents a shared pair of electrons (one from each bonding atom).
* Lone pairs are shown as dots.
* The diagram should satisfy the octet rule (except for hydrogen, which follows the duet rule), meaning each atom (except for hydrogen) should have eight electrons in its valence shell.
