6.14 State the number of protons and electrons in each of the following ions: a. P3-, needed for bones and teeth
b. F.
used to strengthen tooth enamel
d. Nat, most prevalent positive ion in extracellular fluid

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage