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10 Cards in this Set
- Front
- Back
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Proton
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a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
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Electron
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a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
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Neutron
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a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
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Atomic Number
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the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
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Mass Number
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the total number of protons and neutrons in a nucleus.
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Isotopes
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each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons, and differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
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Energy Levels
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the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.
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Electron Cloud
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An atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom.
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Period
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a set of elements occupying an entire horizontal row in the periodic table.
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Group
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a set of elements occupying a column in the periodic table and having broadly similar properties arising from their similar electronic structure.
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