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Cards In This Set
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Element
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Substance that can't be broken down into simpler chemical substances
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Atom
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Smallest particle of an element that has characteristics of that element-basic building block of all matter
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Nucleus
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Positively charged center of an atom composed of nuetrons and protons and surrounded by negative electrons
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Isotope
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Atoms of the same element that have different numbers of nuetrons
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Compound
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Substance composed of atoms of two or more different elements that are chemically combined
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Covalent bond
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Chemical bond formed when two atoms share electrons
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Molecule
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Group of atoms held together by covalent bonds; no overall charge
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Ion
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Atom or group of atoms that gain or lose electrons- electrical charge
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Ionic bond
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Chemical bond formed by attraction of forces between 2 ions of opposite charge
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Metabolism
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All of the chemical reactions that occur within an organism
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Mixture
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Combination of substances in which individual substances retain their own properties
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Solution
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Mixture in which one or more solvents is dissolved in a solute
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PH
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Measure of how acidic or basic a solution is; 0-14
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Acid
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Any substance that forms hydrogen ions in water and has a pH below 7
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Base
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Any substance that forms hydroxide ions in water and has a pH above 7
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