A close up of a bunch of different colored spheres

An atom is the smallest fundamental unit of matter. It is composed of a central nucleus and a cloud of electrons. The nucleus contains protons and neutrons. Protons have a positive electric charge, while neutrons have no electric charge. The number of protons determines the atomic number of the element. Electrons orbit around the nucleus at different energy levels or levels. Each shell can contain a maximum number of electrons. Electronics have a negative electrical charge and are involved in chemicals. The number of electrons in a neutral atom is equal to the number of protons. The atoms of the same element have the same number of protons, but can vary in the number of neutrons, generated in isotopes. Atoms combine with each other through chemical bonds to form and compounds. The combination of atoms and the perfect ones between them determine the chemical and physical properties of substances,

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