1. How many valence electrons does magnesium have? 2

2. How many valence electrons does nitrogen have? 5

3. What is the oxidation number of Oxygen? -2

4. Which is the only noble gas without 8 valence electrons? He

5. How many electrons would Fluorine like to lose or gain to become fluoride? Gain 1

6. What is the charge of a Fe (II) ion? +2

7. What is the name of K 2 O? Potassium oxide

8. What is the name of SiO 2 ? Silicon dioxide

9. What is the name of Cu 2 O? Copper (I) oxide

10. What is the formula for sodium sulfate? Na 2 SO 4

11. What is the formula (with charge) for a phosphate ion? PO 4 3-

12. In Beryllium Chloride (BeCl 2 ), which element is losing electrons? How many? Be loses 2

13. What is happening with the electrons in a single covalent bond? 2 electrons are shared between atoms

14. What is the EN difference in a Carbon-Oxygen bond? Is that polar or non? 0.9, polar

15. Why is CO 2 a non-polar MOLECULE? Symmetrical; dipoles cancel

16. What symbol do we use for a dipole? ++

17. What are the electrons doing in a POLAR covalent bond? Being shared UNEQUALLY

18. Is TiO ionic or covalent? Ionic

19. Is NO ionic or covalent? Covalent

20. Is NH 4 OH ionic or covalent? Ionic

21. What is the name of NH 4 OH? Ammonium hydroxide

22. What is the formula for nickel (II) carbonate? NiCO 3

23. How many domains does the carbon in CH 4 have? 4

24. What is the name of the shape CH 4 has? Tetrahedral

25. How many domains does the carbon in NH 3 have? 4

26. What is the name of the shape NH 3 has? Trigonal pyramidal

27. Which element only needs 6 electrons (instead of an octet)? Boron

28. Why is a water molecule bent instead of linear? Lone pairs

29. Which is the strongest intermolecular force? Molecule-ion interaction

30. Which intermolecular force is responsible for water’s high boiling point? Hydrogen bonding

31. Hydrogen bonding is an extra strong example of what other intermolecular force? Dipole-dipole interaction

32. Which intermolecular force is present with nonpolar compounds? Dispersion forces

33. One of which 3 elements needs to be attached to hydrogen for hydrogen bonding to occur? N, O, or F