Which of the following radiation sources provides the greatest radiation dose?
one year of natural background radiation
one x-ray at the dentist
food that has been irradiated
a nuclear power plant

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.