Sleep Number King Size 2-3 inch Mattress Bed Foam Topper Pad 7000, i8, i9.
Quick Answer. The three parts of an atom are the protons, neutrons and electrons. Atoms make up the basic building blocks of matter and define the structure of elements. These parts were not officially identified until 1932.
Atoms are the basic units of matter. They are made up of three particles: protons, neutrons and electrons. Definition of an atom, nucleus, proton, neutron, electron and isotope.