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.
An atom is the smallest possible particle of a chemical element consisting pr protons, electrons and (usually) neutrons. An isotope is one variant of an element with a given â¦ number of neutrons. Different isotopes of an element have different numbers of neutrons.