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14 Cards in this Set
- Front
- Back
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Atomic Number
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the number of protons in the nucleus of an atom; thr atomic number is the same for all atoms of an element
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Average Atomic Mass
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the weighted average of the mass of all naturally occurring isotopes of an element
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Chemical Symbol
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a one-, two-, or three-letter abbreviation of the name of an element
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Electron
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a subatomic particle that has a negative charge
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Group
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a vertical column of elements in the periodic table; elements in a group share chemical properties
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Mass Number
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the sum of the numbers of protons and neutrons in thr nucleus of an atom
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Metal
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an element that is shiny and conducts heat and electricity well
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Metalloid
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an element that has properties of both metals and nonmetals
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Neutron
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a subatomic particle that has no charge and that is located in the nucleus of an atom
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Nonmetal
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an element that conducts heat and electricity poorly
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Nucleus (Atoms)
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an atom's central region, which is made up of protons and neutrons
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Period
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a horizontal row of elements in the periodic table
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Periodic Table
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an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group
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Proton
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a subatomic particle that has a positive charge and that is located in the nucleus of an atom; determines the identity of an element
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