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15 Cards in this Set
- Front
- Back
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A capital letter or a combination of a capital letter and small letter that is used to represent an element
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Chemical Symbol
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The horizontal row of elements
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Period
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An average of the masses of all the isotopes that occur in nature for an element
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Average Atomic Masss
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Vertical columns of elements
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Groups
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Elements in the middle of the periodic table, periods 4 through 7
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Transition elements
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The number of protons in an atom is
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Atomic Number
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Protons and neutrons can be subdivided into___by colliding them
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Quarks
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The center of an atom where protons and neutrons are located
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Nucleus
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A total count of the neutrons and protons in an atom
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Mass Number
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Atoms of the same element but with different numbers of neutrons
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Isotopes
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Elements that are found on the left side of the perodic table
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Metals
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Elements that have some properties of both metals and nonmetals
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metalloids
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The particles that move about the nucleus and have negative charge
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electrons
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The region around the nucleus occupied by electrons
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Electron Cloud
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A chart that shows the classification of elements
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Periodic Table
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