CHM 2045C Sample test Name: ____________________

Module Four: Part B Dot Structures of Molecules 15 points

Using a periodic chart draw the electron dot structures of the following molecules: (Choose One for each question or the one circled on the paper)

1. NH₃ CH₄ H₂O₂ H₂O 2. H₂SO₄ H₃PO₄ HClO₄ HClO₃

3. HNO₃ H₂CO₃ HNO₂ 4. CO₂ HCN SiO₂ SO₃

5. HC₂H₃O₂ H₂C₂O₄ HCHO₂ 6. C₂H₄ C₂H₂ C₃H₈ C₂H₆

carbon to carbon by single covalent bond bond carbons to carbon

7. CH₂O CH₃COCH₃ CH₂NH₂COOH 8. CH₃OCH₃ CHONH₂ CH₃COOCH₂CH₃

carbon to carbons by single covalent bonds oxygen separates O & N both carbon to carbons by single

the carbons bond to C covalent bonds

(CH₂ also hooks to oxygen in#3)