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17 Cards in this Set
- Front
- Back
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Protons
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Positively charged
mass = 1 amu |
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Neutrons
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No charge
mass =1 amu |
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Electrons
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Negatively charged
mass> 1amu |
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Atomic Number
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Number of protons in the nucleus
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Isotopes
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Different kinds of atoms of an element that contain a different amount of neutrons, resulting in slightly different masses
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Mass number
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is equal to the number of protons and neutrons
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Ions
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Charged atoms
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Metals
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Loosely held electrons, tend to lose electron and form positive ions
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Nonmetals
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Tightly held electrons, tend to gain electrons and become negatively charged
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Cation
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Positively charged ion
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Anion
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Negatively charged ion
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Periodic law
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If we order the elements in order of atomic # the properties will repeat
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Group 1
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Alkali Metals
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Group 2
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Alkaline Earth Metals
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Group 17
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Halogens
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Group 18
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Noble Gases
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The Mole
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6.022*10^23 atom
grams of any element= 1 mol |
