Chapter 2 Atoms, Molecules and Ions

1. The following data were collected for several compounds of nitrogen and oxygen:

If compound X has an equal number of oxygen and nitrogen atoms, what is the most likely

formula for compound Y?

a) NO

b) NO2

c) N2O

d) N2O5

2. Which of the following equation satisfies the law of conservation of mass?

3. Which of the following is a correct representation of the reaction:

2H2(g) + O2(g) 2H2O(g)

4. Which of the following combination of elements is likely to produce an ionic bond?

a) Li and Cl

b) Li and Rb

c) N and S

d) N and O

Name the following:

5. Ba(NO3)2 ________________________________

Chapter 2 Atoms, Molecules and Ions

6. CH4 ________________________________

7. HBr ________________________________

8. Cu(OH)2 ________________________________

9. H2CrO4 ________________________________

10. Hg2SO4 ________________________________

11. SF6 ________________________________

12. HNO2 ________________________________

13. NH4HCO3 ________________________________

14. H2CO3 ________________________________

15. Pb(C2H3O2)2 ________________________________

16. HgSO3 ________________________________

17. OF2 ________________________________

18. NH3 ________________________________

19. Cu3(PO4)2 ________________________________

20. HNO3 ________________________________

21. BaSO3 ________________________________

22. KMnO4 ________________________________

23. K2Cr2O7 ________________________________

24. CuI ________________________________

25. H2SO4 ________________________________

26. Mg(HCO3)2 ________________________________

27. N2O3 ________________________________

Write the formula:

28. Magnesium hydroxide ________________________________

29. Dinitrogen tetroxide ________________________________

30. Hydrofluoric acid ________________________________

31. Arsenic Pentachloride ________________________________

32. Sulfuric acid ________________________________

33. Sulfurous acid ________________________________

34. Hydrosulfuric acid ________________________________

35. Mercury I iodide ________________________________

Chapter 2 Atoms, Molecules and Ions

36. Mercury II iodide ________________________________

37. Barium phosphate ________________________________

38. Phosphoric acid ________________________________

39. Tricarbon octahydride ________________________________

40. Hydroiodic acid ________________________________

41. Silver nitrate ________________________________

42. Ammonium chloride ________________________________

43. Oxalic acid ________________________________

44. Carbon tetrachloride ________________________________

45. Potassium nitrate ________________________________

46. Acetic acid ________________________________

47. Magnesium sulfate ________________________________

Symbol Number of protons in

nucleus

Number of neutrons in

nucleus

Number of

electrons

Net

charge

23892 U

92 146 92 0

4020 Ca2+

20 20 18 2+

5123 V3+

23 28 20 3+

Chapter 2 Atoms, Molecules and Ions

8939 Y

39 50 39 0

Br7935 35 44 36 1−

3P3115 15 16 18 3−

Chapter 2 Atoms, Molecules and Ions