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Chem > Chapter 1 definitions > Flashcards

Chapter 1 definitions Flashcards

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1
Q

Scientific Method

A

a systematic approach to research

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2
Q

Qualitative

A

general observations about system

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3
Q

Hypothesis

A

tentative explanation for a set of observations

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4
Q

Law

A

concise verbal/mathematical statement of a relationship between phenomena that is always the same under the same conditions

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5
Q

Theory

A

the unifying principle that explains a body of facts and/or those laws that are based on them

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6
Q

Matter

A

anything that occupies space and has mass

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7
Q

Chemistry

A

study of matter and the changes it undergoes

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8
Q

Matter exists in 3 states

A

Solid, liquid, gases

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9
Q

Substance

A

matter that has a definite/constant composition and distinct properties

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10
Q

Mixture

A

combination of two or more substances in which the substances retain their distinct identities

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11
Q

Homogenous mixture

A

composition of the mixture is the same throughout the solution

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12
Q

Heterogenous mixture

A

composition is not uniform

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13
Q

Element

A

a substance that cannot be separated into simpler substances by chemical means

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14
Q

Compound

A

a substance composed of two or more elements chemically united in fixed proportions

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15
Q

Physical properties

A

measured and observed without changing the composition or identity of a substance

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16
Q

Chemical property

A

to observe this property we must carry out a chemical change

17
Q

Extensive property

A

dependent on how much matter is being considered

18
Q

Intensive property

A

not dependent on the amount of matter being considered

19
Q

Macroscopic properties

A

can be determined directly

20
Q

Microscopic properties

A

on the atomic or molecular scale. must be determined by an indirect method

21
Q

mass

A

measurement of the quantity of matter in an object

22
Q

Weight

A

force that gravity exerts on an object

23
Q
A

Chem (11 decks)

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