Chemistry Matter and Change: Study Guide
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matter
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anything that has mass and occupies space (volume)
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chemistry
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the study of the properties of matter and how matter changes
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substance
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a single kind of matter that is pure and has a specific set of properties
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physical property
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a characteristic of a pure substance tha can be observed without changing it into another substance
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chemical property
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a characteristic of a pure substance that describes its ability to change into a different substance
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element
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a pure substance that cannot be broken down into other substances by chemical or physical means
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atom
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the basic particle from which all elements are made
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chemical bond
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the force that holds two atoms together
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compound
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a pure substance made of two or more elements chemically combined
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chemical formula
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a formula that gives the elements in a compound and the ratio of atoms
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mixture
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two or more substances that are mixed together but not chemically combined
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iron
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This metal is an element that rusts easily
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physical change
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a change in a substance that does not change its identity
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chemical change/ reaction
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a change in which one or more substances combine or break apart to form new substances
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periodic table
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A chart in which elements having similar chemical and physical properties are grouped together
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metal
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Elements that are typically hard, shiny, malleable, ductile, and a good conductor of heat and electricity.
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nonmetal
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Dull; cannot be easily shaped; poor conductors of electricity; some are gases. Example: carbon, oxygen.
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metalloid
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Element that has properties of both metals and no metals
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atomic number
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Number of protons in the nucleus
