객관식In a simplified model of the atom, which subatomic particles account for most of the atom's mass?74views
객관식In the simplified model of subatomic particles, what type of electric charge does a proton have?75views
객관식In simplified relative-mass terms, what is the relative mass of an electron compared to a proton (proton =1)?94views
객관식In a simplified model of atomic stability, which subatomic particles do not significantly affect the stability of the atom’s nucleus?71views