Unit 6 Review Worksheet
1. Individual atoms of elements are ( more / less ) stable than when they are
2. What is the difference between ionic and
3. What is the cut-off number for the difference
in electronegativity to determine whether a
bond is ionic or covalent?
4. Between what types of elements does ionic
5. Between what types of elements does polar covalent bonding occur? Nonpolar covalent?
6. What should you do with any left over electrons when drawing Lewis structures?
7. What should you do if you have used all of
the electrons and the central atom still does not
have 8 electrons?
8. How can you tell which is the central atom by
looking at the chemical formula?
9. What two (2) requirements must a molecule
meet in order to be considered nonpolar?
10. What do “A”, “B”, and “E” stand for when
determining the class of a molecule?
11. What does the subscript “2” mean in the class
12. Which classes of molecules have a bent shape?
13. Which class of molecules has a linear shape?
14. Which class has a tetrahedral shape?
15. Which class has a trigonal
16. Which class has a trigonal
17. What is the smallest unit of an ionic compound called? A covalent compound?
18. Which type of compound has low melting points?
19. Which type of compound dissolves in water?
20. Which type of compound conducts electricity
21. Which type of compound occurs as liquids,
gases, or non-crystalline solids?
22. What are the four types of intermolecular
23. Between which types of compounds do these
intermolecular forces occur?
24. Arrange the following in order of increasing
25. For each of the following compounds, draw the
Lewis structure. Then tell the molecular
class, and shape of the molecule. Also tell the type(s) of IM forces that occur within
a sample of that compound.