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Atom

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The smallest unit of a chemical element that retains its chemical properties.

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Proton

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A positively charged particle found in the nucleus of an atom.

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Neutron

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A neutral particle found in the nucleus of an atom.

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Electron

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A negatively charged particle that orbits the nucleus of an atom in different energy levels.

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Nucleus

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The central part of an atom that contains protons and neutrons.

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Element

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A substance consisting of one type of atom.

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Compound

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A substance made of atoms of different elements bonded together.

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Mixture

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A combination of different substances that retain their individual properties.

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Property

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A characteristic that defines or identifies a substance.

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Kinetic Energy

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The energy that an object possesses due to its motion.