Part A: Determine the type of bond in each of the following molecules. Draw the partial positive and partial negative regions where needed.
1) CCl4
2) C2H6
3) Cl20
4) F2
5) C2H2
6) CSO
7) SiSez
8) O2
9) SF2
10) PH2CI

What is common about these molecules? a. their atoms are held together by covalent bonds. b. they are all made up of the same two atoms. c. their atoms are held together by ionic bonds. d. they are all made up of oxygen atoms only.

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

Nonpoint source pollution is difficult to control because it