Which of these equations is balanced?

3. if the dartboard below is used to model an atom, which subatomic particles would be located at z?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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