What is the Structure of the Atom?: OUP Chemistry Series.
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What is the Structure of the Atom?: OUP Chemistry Series.
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Atoms are composed of a central nucleus, which contains positively charged protons and neutrally charged neutrons, clumped together. Smaller, negatively charged electrons orbit around the nucleus in layered energy levels called shells. An atom is the smallest particle of any element. Animated diagrams illustrate the structure of the atom, the proton (or atomic) number, the mass number, and how elements are arranged in the periodic table.
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