객관식In the simplified model of subatomic particles, what is the electric charge of a single proton?103views
객관식In a simplified model of the atom, which subatomic particles are located in the center of the atom (the nucleus)?76views
객관식Two atoms always represent the same element if they have the same number of which subatomic particle?102views
객관식In a simplified model of subatomic particles, what is the relative mass of an electron compared with a proton (proton mass =1)?66views
객관식In a simplified model of subatomic particles, what kind of electric charge does a proton have?57views