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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.
How can a study feel out the shape of an atom? Atoms are made of two main parts, and each part necessitates a different method. In the very center of the atom is the tiny nucleus, a dense cluster of protons and neutrons. The space surrounding this nuclear core is a group of electrons, known as the electron cloud. The latter dwarfs the former: if the nucleus were magnified to the size of a marble, the electron cloud would extend roughly a quarter of a mile in all directions from it.