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.
Smallest part of an element that can still retain the properties of that element. These make up the atom, and they are protons, neutrons, and electrons. This subatomic particle is in the nucleus of the atom, and has a positive charge. This subatomic particle circles the nucleus of an atom in a motion called an orbital.