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Mrs. Perl's study guide ch 1 and 2

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Section 1

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pure substance

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6 years ago

Date created

Mar 1, 2020

Cards (19)

Section 1

(19 cards)

pure substance

Front

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

Back

Mixtures

Front

grouping of two or more substances that do NOT chemically combine.

Back

Atom

Front

Basic unit of matter

Back

CFCs

Front

Chlorinated Fluorocarbons are chemicals that break down the ozone layer

Back

physical change

Front

A change in a substance that does not involve a change in the identity of the substance

Back

chemical property

Front

A characteristic of a pure substance that describes its ability to change into different substances

Back

Molecule

Front

two or more atoms held together by covalent bonds

Back

Ozone

Front

A form of oxygen that has three oxygen atoms in each molecule instead of the usual two.

Back

Elements

Front

A molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions.

Back

chemical change

Front

A change in matter that produces one or more new substances

Back

alchemy

Front

medieval chemical philosophy based on changing metal into gold; a seemingly magical power or process of transmutation

Back

hydrogen peroxide

Front

Chemical compound of hydrogen and oxygen; a colorless liquid with a characteristic odor and slightly acid taste.

Back

Compounds

Front

2 or more elements chemically combined

Back

exothermic reaction

Front

A reaction that RELEASES energy in the form of heat

Back

state of matter

Front

A physical property that describes matter as a solid, liquid, or gas.

Back

physical property

Front

A characteristic of a pure substance that can be observed without changing it into another substance

Back

allotropes of carbon

Front

diamond, graphite, fullerene

Back

endothermic reaction

Front

A reaction that ABSORBS energy in the form of heat

Back

DDTs

Front

a synthetic organic compound used as an insecticide-banned in most countries now.

Back