an atom has 5 protons
neutrons has about_as_much_mass_as_protons proton is rocket. hydrogen_atoms has one_proton_and_one_electron hydrogen has atomic_number_of_one protons is not component_of_atoms. atoms has not electrons protons is component_of_atoms. hydrogen_atoms has not one_proton_and_one_electron atoms has electrons hydrogen has not atomic_number_of_one