AP Chemistry :Chapter 2 Review Name_______________________________

Date _______________________________

1. An atom has 25 protons 19 neutrons, what is its symbol? 1._______

2. An ion has 45 protons, 56 neutrons and 47 electrons. What is its symbol? 2._______

3. An ion has 50 protons, 68 neutrons and 48 electrons. What is its symbol? 3._______

Directions: Use the following list to answer the questions.

I. Mg II. Rb III. S

4. Which will form a positive ion?

A. I only B. II only C. III only. D. I and II 4._______

5. Which will conduct electricity?

A. I only B. II only C. III only. D. I and II 5._______

6. Which is a brittle solid?

A. I only B. II only C. III only. D. I and II 6._______

Name the following compounds.

7. Na₂O _________________________________

8. CaCl₂ ________________________________

9. MnS₂ _________________________________

10. CoF₃ _________________________________

11. Na₂SO₄ _______________________________

12. Fe(NO₃)₂ __________________________

13. CCl₄ _________________________________

14. NO ___________________________________

15. NF₃ _________________________________

16. HF __________________________________

17. HNO₃ ________________________________

Write the formulas for the following compounds.

18. Sodium bromide ___________

19. Strontium nitride ___________

20. Cadmium (II) nitrate ________

21. Ammonium chloride ________

22. Tin (IV) oxide _____________

23. Carbon disulfide ___________

24. Diphosphorus pentoxide _____

25. Hydrobromic acid __________

26. Sulfurous acid _____________

27. When nitrogen and oxygen react they can form several compounds.

Mass of oxygen that combines

with one gram of nitrogen.

Compound I 1.750 g

Compound II 0.8750 g

Compound III 0.4375 g

Show how this data supports the law of multiple proportion.