Answer
Electrons, neutrons, protons.
Work Step by Step
Atoms are made of up of three subatomic particles: electrons, neutrons, and protons
(1) electrons- negatively charged, less mass than protons and neutrons, exist outside of nucleus in distinct orbits
(2) neutrons- neutral (no) charge, almost same mass as proton, located inside nucleus
(3) protons- positively charged, very high mass, located inside nucleus
