CHM 2045C Sample Test Name: ____________________

Module Four: Part B Dot Structures of Molecules 30 points

Using a periodic chart draw the electron dot structures or dot/stick structures of the following molecules: (You must show all lone pairs) (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 CO SO₃

5. HC₂H₃O₂ H₂C₂O₄ HCHO₂ 6. C₂H₄ C₂H₂ C₃H₈ C₂H₆

carbon to carbon by single covalent bond bond carbons to carbon

7. CH₂O CH₃COCH₃ CH₃CH₂OH 8. CH₃OCH₃ CHONH₂

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

9. CH₂NH₂COOH CH₃CHNH₂COOH 10. CH₃COOCH₂CH₃ CHOOCH₃

(work on back) carbon to carbons by single covalent bonds (CH₂ also hooks to oxygen in#2)