Atomic Structure Flash Cards: Daily Warm Up Vocab

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ATOM

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The basic unit of a chemical element, consisting of a nucleus containing protons and neutrons, with electrons.

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ELEMENT

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A substance composed of atoms that all have the same number of protons in their atomic nuclei.

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NUCLEUS

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The central part of an atom, containing protons and neutrons.

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PROTON

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

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NEUTRON

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A neutrally charged subatomic particle found in the nucleus of an atom.

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ELECTRON

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A negatively charged subatomic particle that orbits the nucleus of an atom.

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ATOMIC NUMBER

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The number of protons in the nucleus of an atom, which determines the element's identity.

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ATOMIC MASS

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The mass of an atom, which is approximately equal to the number of protons and neutrons in the nucleus.

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Valence Electron

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Electrons in the outermost energy level of an atom that are involved in chemical bonding.

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Energy Level (Shell)

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A region of an atom where electrons orbit the nucleus at a specific energy level.

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