13. What is true of elements in the same column on the periodic table?

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

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

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol