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.
Parts of the Atom. An atom consists of three parts: protons, neutrons, electrons. Protons and neutrons are in the centre of an atom, which is called the nucleus. It is very small if you compare it with the whole atom and it has almost all of an atomâs mass.