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27 Cards in this Set
- Front
- Back
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atom
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smallest unit of measure that cannot be broken down by chemical means
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element
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pure substance made of only one kind of atom
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compound
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a substance made up of the joined atoms of two or more different elements.
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molecule
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group of atoms held togther by covalent bond
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chemical bond
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force that bonds atoms
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isotope
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atoms of an element that contain different number of neutrons
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covalent bond
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formed when two or more atoms share electrons to form a molecule
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polar molecule
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molecules with an unequal distribution of electrical charge
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hydrogen bond
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a weak attraction between two polar molecules
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ion
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an atom or molecule that has gained or lost one or more electrons
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ionic bond
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bond in which electrons are transferred
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cohesion
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attraction between substances of the same kind
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adhesion
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an attraction between different substances
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solvent
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dissolves
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solute
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what is being dissolved
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acids
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compounds that form hydrogen ions when dissolved in water
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bases
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compounds that reduce the concentration of hydrogen in a solution
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hydrogen ions
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H+, acid
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hydroxide ions
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OH-, base
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neutralization reaction
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making reaction neutral
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two products produced during neutralization reaction
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water and salt
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name some similarities between two isotopes of the same element
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contains the same number of protons (have the same atomic number)
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name some differences between two isotopes of the same element
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different num of neutrons (different mass)
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why do atoms share or transfer electrons?
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to fill an outer shell or become stable
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difference between polar and nonpolar molecules
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polar molecules have an unequal distribution of charge and nonpolar do not
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sodium chloride is?
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a compound
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what is a substance that would not dissolve well in water
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oil becuase it is a nonpolar substance
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