1. Chemical Bonding Review Are you ready to play?

2. Chemical Bonding Review Question 1: Why do elements form chemical bonds.

3. Chemical Bonding Review Answer 1: Elements form bonds in order to have 8 valence electrons like the noble gases

4. Chemical Bonding Review Question 2: What types of bonds are found in KClO 3 ?

5. Chemical Bonding Review Answer 2: KClO 3 contains both ionic and covalent bonds. Why? The ionic bond occurs between the positive K + ion and the negative ClO 3 - ion. The ClO 3 - ion is held together with covalent bonds.

6. Chemical Bonding Review Question 3: Describe the mechanism of ionic bonding.

7. Chemical Bonding Review Answer 3: Ionic bonding occurs when a metal transfers electrons to a nonmetal.

8. Chemical Bonding Review Question 4: Which set of atoms would likely form polar covalent bonds: a) sodium and chlorine, b) oxygen and hydrogen, c) hydrogen and hydrogen, or d) chlorine and chlorine?

9. Chemical Bonding Review Answer 4: Choice b - oxygen and hydrogen would most likely form polar covalent bonds.

10. Chemical Bonding Review Question 5:Describe the mechanism of covalent bonding.

11. Chemical Bonding Review Answer 5: Covalent bonding occurs when 2 nonmetals share electrons.

12. Chemical Bonding Review Question 6: Which molecule would be nonpolar? a) NaCl, b)CF 4, c)H 2 O, or d) NH 3

13. Chemical Bonding Review Answer 6: Choice b - CF 4 would be a nonpolar molecule.

14. Chemical Bonding Review Question 7: Which molecule contains polar covalent bonds? a) O 2, b) CH 4, C) Li 2 O, d) CO

15. Chemical Bonding Review Answer 7: Choice d- CO would contain polar covalent bonds

16. Chemical Bonding Review Question 8: The electronegativity difference between phosphorus and nitrogen is 0.8. What type of bond would phosphorus and nitrogen form?

17. Chemical Bonding Review Answer 8: Phosphorus and nitrogen would form a polar covalent bond.

18. Chemical Bonding Review Question 9: Which molecule would not be linear? a) O 2, b)CO 2, c) OF 2, or d)HF

19. Chemical Bonding Review Answer 9: Choice c - OF 2 would not be linear.

20. Chemical Bonding Review Question 10: Which molecule would be a trigonal pyramid? a) H 2 Ob) SO 4 2- c)SO 3 d)NH 3

21. Chemical Bonding Review Answer 10: Choice d – NH 3 would be a trigonal pyramid.

22. Chemical Bonding Review Question 11: What type of chemical bonds are found in PCl 3 ?

23. Chemical Bonding Review Answer 11: PCl 3 contains only covalent bonds.

24. Chemical Bonding Review Question 12: The electronegativity difference between Br and Cs is 2.1, what type of bond would these elements form?

25. Chemical Bonding Review Answer 12: Cs and Br would form an ionic bond.

26. Chemical Bonding Review Question 13: What is the shape of an F 2 molecule?

27. Chemical Bonding Review Answer 13: F 2 forms a linear molecule.

28. Chemical Bonding Review Question 14: Which molecule will likely contain polar bonds? a) H 2 b) CH 4 c) SO 3 d) C 2 H 2

29. Chemical Bonding Review Answer 14: Choice c- SO 3 contains polar bonds

30. Chemical Bonding Review Question 15: Which compound contains both ionic and covalent bonds? a) Cu 2 O b) Ca(NO 2 ) 2 c) CCl 4 d) H 2 O

31. Chemical Bonding Review Answer 15: Choice b- Ca(NO 2 ) 2 has both ionic and covalent bonds

32. Chemical Bonding Review Question 16: Which molecule contains polar bonds but is nonpolar overall? a) CF 4 b) HCl c) O 3 d) SO 3 2-

33. Chemical Bonding Review Answer 16: Choice a- CF 4 is nonpolar even though it has polar bonds

34. Chemical Bonding Review Question 17: Which molecule contains nonpolar bonds but is polar overall? a) H 2 O b) HCl c) O 3 d) SO 3 2-

35. Chemical Bonding Review Answer 17: Choice c- O 3 is polar even though it contains nonpolar bonds.

36. Chemical Bonding Review Question 18: Which molecule will be tetrahedal? a) SO 3 2- b) CH 4 c) SO 3 d) C 2 H 2

37. Chemical Bonding Review Answer 17: Choice b- CH 4 is tetrahedral

38. Chemical Bonding Review Question 18: Which set of atoms would likely form a molecular (covalent) compound: a) sodium and chlorine, b) oxygen and lithium, c) hydrogen and oxygen, or d) chlorine and calcium?

39. Chemical Bonding Review Answer 18: Choice c - oxygen and hydrogen would most likely form a molecular (covalent) compound.

40. Chemical Bonding Review Question 19: Identify the shape of the nitrate ion. NO 3 -

41. Chemical Bonding Review Answer 19: The nitrate ion has a trigonal planar shape.

42. Chemical Bonding Review Question 20: Which compound would be likely to have a high boiling point: a) H 2 O, b) CH 3 Cl, c) FeCl 3, or d) NH 3 ?

43. Chemical Bonding Review Answer 20: Choice c- FeCl 3 would most likely have a high boiling point.

44. Chemical Bonding Review Question 21: How many possible resonance structures does the nitrate ion have? NO 3 -

45. Chemical Bonding Review Answer 21: The nitrate ion has 3 possible resonance structures.

46. Chemical Bonding Review Question 22: Which compound would be ionic? a) NaCl, b)CF 4, c)H 2 O, or d) NH 3

47. Chemical Bonding Review Answer 22: Choice a - NaCl would be a ionic.

48. Chemical Bonding Review Question 23: Name 3 properties of ionic compounds.

49. Chemical Bonding Review Answer 23: Ionic compounds have the following properties: they are made of metals and nonmetals; they have high melting/boiling points; they are solid state at room temperature; they are brittle solids; they are good conductors electricity when melted or dissolved in water.