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.
All matter is made up of atoms, earning it the name the building block of matter. While atoms are the smallest part to possess the element's characteristics, atoms are made up of smaller parts called electrons, neutrons and protons. Protons carry a positive charge, while electrons carry a negative one. Neutrons are neutral.