Periodic Table, The periodic table is a chart that lists all known elements., Inside, Protons are located inside the nucleus., Element, Element: Is a chemical substance that cannot be broken down into a simpler substance and keep the same properties. , Nucleus, The center of an atom is called a nucleus., Electron Cloud, The electron cloud is the area in an atom with the least amount of mass., Mass, Protons + neutrons = Mass, Outside, Electrons are located outside of the nucleus. , Neutron, A neutron has a neutral charge., Atom, An atom is the basic unit of a chemical element. .

Atoms

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