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Definition
| the smallest particle of an element |
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| a unique number that tells the number of protons |
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Definition
| the phase change between a gas and a liquid |
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| two or more elements bonded together; can be broken into simpler substances |
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| the phase change from a gas to a solid |
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Definition
| numbers thatappear before a formula in a chemical equation |
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Definition
| the separation of ions in an ionc compound |
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Definition
| the process of dissolving by breaking into smaller pieces |
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Definition
| the process where neutral molecules gain or lose electrons |
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Definition
| new substances formed as a result of a chemical reaction |
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Definition
| a substance that undergoes change in a chemical reaction |
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Definition
| a number written to the lower right of the element to help balance the charges |
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Definition
| a substance whose particles are dissolved in a solution |
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Definition
| a substance in which a solute dissolves |
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Definition
| the sum of the number of protons and neutrons in an atom |
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Definition
| atoms of a given element that have different numbers of neutrons |
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Definition
| the possible energies that electrons in an atom can have |
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Definition
| a state in which all the electrons in an atom have the lowest possible energies |
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Definition
| a row in the periodic table |
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Definition
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Definition
| a pattern of repeating properties displayed by the elements in the periodic table |
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Definition
| elements that are good conductors of heat and electricity |
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Term
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Definition
| elements that are poor conductors |
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Term
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Definition
| elements with propeties that resemble both metals and nonmetals |
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Definition
| a diagram of an atom using dots to represent valence electrons |
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| a neutral group of atoms that are joined together covalently |
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Definition
| an unequal sharing of electrons |
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Definition
| an equal sharing of electrons |
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Definition
| a covalently bonded group of atoms that has a positive or negative charge and acts as a unit |
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Definition
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Definition
| a system absorbs energy from its surroundings |
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| a system releases energy into its surroundings |
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| matter that always has the exact composition |
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| a mixture that forms when substances dissolve and form a homogeneous mixture |
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| a statement that summarizes a pattern found in nature |
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| the amount of matter in an object |
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Definition
| the amount of space an object takes up |
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Definition
| an experiment where only one variable is changes at a time |
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Definition
| a variable that changes in respone to a change in the manipulated variable |
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Definition
| The variable that causes a change in another variable |
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Definition
| educated guess to a problem |
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Definition
| information obtained through the senses |
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