Polyvalent ions are 1) Anions with variable charges
2) Cations from columns 3 to 12
3) Ions that can be positive or negative

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

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

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space