1what is the approximate mass of a proton?
(1)1 u (3) l g
(2) 0.0005 u (4) 0.0005 g

What is the relation between concentration of reactants and the rate of chemical reaction?

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 other elements contain the same number of outer electrons as sodium