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PART A - Valence Electrons and Charges: Complete the following table. Element | Symbol | Group | Number of...

PART A - Valence Electrons and Charges: Complete the following table.
Element | Symbol | Group | Number of Valence Electrons | Gain or Lose? | Cation or Anion? | Charge
1. Lithium
2. Iodine
3. Sulfur
4. Calcium
5. Nitrogen
PART B - Charges: Write the charge that will form when the following elements become ions.
6. Na ___
7. P ___
8. Cl ___
9. Ba ___
10. F ___
11. Se ___
12. Mg ___
13. K ___
14. Br ___
15. Al ___
16. N ___
17. Rb ___
18. Sr ___
19. O ___
20. Se ___
PART C - Ionic Bonding: Predict how the following pairs of elements will bond.
21. Ca + O ___
22. Li + Br ___
23. Al + F ___
24. K + S ___
25. Ba + I ___
26. Al + O ___
27. Sr + N ___
28. H + F ___
29. B + Cl ___
30. Cs + S ___

Answer

PART A - Valence Electrons and Charges:

  1. Lithium: Symbol - Li, Group - 1, Number of Valence Electrons - 1, Lose, Cation, Charge - +1
  2. Iodine: Symbol - I, Group - 17, Number of Valence Electrons - 7, Gain, Anion, Charge - -1
  3. Sulfur: Symbol - S, Group - 16, Number of Valence Electrons - 6, Gain, Anion, Charge - -2
  4. Calcium: Symbol - Ca, Group - 2, Number of Valence Electrons - 2, Lose, Cation, Charge - +2
  5. Nitrogen: Symbol - N, Group - 15, Number of Valence Electrons - 5, Gain, Anion, Charge - -3

PART B - Charges:

  1. Na: +1
  2. P: -3
  3. Cl: -1
  4. Ba: +2
  5. F: -1
  6. Se: -2
  7. Mg: +2
  8. K: +1
  9. Br: -1
  10. Al: +3
  11. N: -3
  12. Rb: +1
  13. Sr: +2
  14. O: -2
  15. Se: -2

PART C - Ionic Bonding:

  1. Ca + O: CaO
  2. Li + Br: LiBr
  3. Al + F: AlF3
  4. K + S: K2S
  5. Ba + I: BaI2
  6. Al + O: Al2O3
  7. Sr + N: Sr3N2
  8. H + F: HF
  9. B + Cl: BCl3
  10. Cs + S: Cs2S

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