Chemistry 1 Chapter 3 Vocabulary

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States of Matter

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Chemistry

27 Terms

1

States of Matter

All matter that exists naturally on earth.

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2

Solid

A form of matter that has it's own shape & volume

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3

Liquid

A form of matter that flows, has constant volume, & takes shape of it's container.

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4

Gas

A form of matter that both flows & fills the entire volume of it's container.

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5

Vapor

A gaseous state of a substance that is a solid or liquid at room temperature.

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6

Physical Property

A characteristic of matter that can be observed or measured without changing the sample's composition.

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7

Extensive Property

Dependent on the amount of substance present.

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8

Intensive Property

Independent of the amount of substance present.

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9

Chemical Property

Ability or inability of a substance to combine with or change into one or more other substances.

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10

Physical Change

Alters a substance without changing its composition.

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11

Phase Change

A transition of matter from one state to another.

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12

Chemical Change

One or more substances changing into new substances.

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13

Law of Conservation of Mass

Mass is neither created nor destroyed during a chemical reaction.

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14

Mixture

A combination of two or more pure substances in which each pure substance retains its individual chemical properties.

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15

Heterogeneous Mixture

A mixture that does not blend smoothly throughout and in which the individual substances remain distinct.

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16

Homogeneous Mixture

A mixture that has constant composition throughout, it has always been a single phase. Also known as a SOLUTION.

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17

Filtration

Technique that uses a porous barrier to seperate a solid from a liquid.

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18

Distillation

A physical separation technique that is based on differences in the boiling points of the substances involved.

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19

Crystalization

A separation technique that results in the formation of pure solid particles of a substance from a solution containing the dissolved substance.

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20

Sublimation

The process during which a solid changes to vapor without melting.

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21

Chromatography

A technique that separates the components of a mixture dissolved in either a gas or a liquid based on the ability of each component to travel or be drawn across the surface of a fixed substrate.

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22

Element

A pure substance that cannot be separated into simpler substances by physical or chemical means.

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23

Periodic Table

Organizes the elements into a grid of horizontal rows called periods and vertical columns called groups or families.

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24

Compound

Made up of two or more different elements that are combined chemically.

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25

Law of Definite Proportions

States that a compound is always composed of the same elements in the same proportion by mass, no matter how large or small the sample.

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26

Percent by Mass

The ratio of the mass of each element to the total mass of the compound expressed as a percentage.

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27

Law of Multiple Proportions

States that when different compounds are formed by a combination of the same elements, different masses of one element combine with the same fixed mass of the other element in a ratio of small numbers.

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