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14 Cards in this Set
- Front
- Back
isotopes
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atoms that have the same atomic number, but different mass numbers (most elements have two or more naturally occurring isotopes that contribute to its average atomic mass).
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Molecule:
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an aggregate of at least two atoms in a definite arrangement held together by chemical bonds
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Ion
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an atom, or group of atoms, that has a net positive or negative chare
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Cation
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positive ions that are formed by the loss of electrons Na -> N+ 1e-
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Anions
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negative ions that are formed by the gain of electrons. Cl + 1e- -> Cl-
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The Molecular formula
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shows that exact number of each element in the smallest unit of a substance
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Empirical Formulas
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Tells us which elements are present and the simplest whole number ration of their atoms (in some cases, the empirical formula is the same as the molecular formula
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Ionic Formulas
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Ionic compounds have an arrangement of cations and anions such that they are electrically neutral
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Binary Ionic Compounds (Type 1)
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Contain metals that form only one cation.
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Binary Ionic Compounds (Type II)
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Contain metals that form multiple cations
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Binary Molecular compounds (Type III)
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Contain metals that form multiple cations
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Acids
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Substance that yields H+ ions in water
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Bases
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Substance that yields OH- ions in water
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Hydrates
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Substance that witha specific number of water molecules attached
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