Chapter 1 - Matter and Change

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classification of matter

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10 Terms

1

classification of matter

matter can exist in three forms or phases: solids, liquids, or gases.

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2

mixtures

a mixture is a material made up of two or more different chemical substances which are not chemically bonded (physical combinations)

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3

pure substances

A substance that has a fixed chemical composition throughout such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.

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4

elements

refers to a simple substance that cannot be broken down into smaller parts or changed into another substance

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5

compounds

A chemical compound is a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds

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6

states of matter

one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma.

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7

chemical properties

any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.

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8

physical properties

any property that is measurable, whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its changes between momentary states

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9

physical change

A change in matter which does not alter the chemical properties of the matter

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10

chemical change

are not reversible except by further chemical reactions.

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