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22 Cards in this Set
- Front
- Back
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Atoms
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basic unit of all matter
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protons
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positively charged particles located in the nucleus of the atom
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neutrons
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particles that have no charge and are located in the nucleus of the atom
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electrons
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negatively charged particles located outside the nucleus
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atomic number
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tells the number of protons in an atom
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mass number
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tells the number of protons plus the number of neutrons
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element
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a simple substance consisting of only one type of atom
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Isotopes
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atoms of the same element that have different numbers of neutrons
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chemical compounds
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combinations of elements in definite proportions
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Chemical formula
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shorthand method of writing a compound using chemical symbols and subscripts
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Ionic bond
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formed through electron transfer
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covalent bond
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formed through electron sharing
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water
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single most abundant compound in most living things
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positive ion
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atom that has lost an electron
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negative ion
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atom the has gained an electron
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polar
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uneven distribution of electrons
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cohesion
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attraction between the molecules of the same substance
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adhesion
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attraction between molecules of different substances
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pH scale
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indicates the concentration of hydrogen ions in a solution
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Acid
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has a pH below 7 and has more hydrogen ions than hydroxide ions
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base
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has a ph above 7 and has more hydroxide ions than hydrogen ions
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buffer
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pH stabilizing compound
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