Acertain atom of helium has 2 protons and 3 neutrons in its nucleus. it has 2 electrons in its electron cloud. what is the atomic mass of this atom?

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.