Carbon has four valence electrons, and chlorine has seven valence electrons. if carbon covalently bonds with chorine, which of the following would represent the lewis dot (electron dot) structure?

1. It is wrong because each chlorine atom should have 3 lone pairs
2. It is wrong because carbon only has four valence electrons
3. It is correct because each chlorine has 3 lone pairs and carbon has 4 electrons covalently bonded with chlorine
4. It is wrong because chlorine only has 7 valence electrons and therefore it cannot have 3 lone pairs and 2 bond pairs for each of C-Cl bonds

The formula is (nh4)2co3