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Chemistry > Matter and Chemical/Physical Changes/Properties > Flashcards

Matter and Chemical/Physical Changes/Properties Flashcards

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1
Q

Chemistry

A

study of composition, structure, and properties of matter. The process that it undergoes and the energy changes that accompany the process

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2
Q

Chemical

A

any substance that has a definite composition (eg; sucrose, water, carbon dioxide)

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3
Q

Matter

A

anything that has mass and volume

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4
Q

Mass

A

measure of the amt of smth

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5
Q

Volume

A

amount of 3-dimensional space an object occupies

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6
Q

Atom

A

the smallest unit of element that maintains chemical identities

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7
Q

element

A

a pure substance that cannot be broken down into simpler substances; single type of atom Eg; gold chlorine

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8
Q

compound

A

substance that can be broken down into small stable substances - made from atoms of 2 or more elements that are chemically bonded eg; H2O

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9
Q

3 states of matter

A

solid liquid gas plasma

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10
Q

solids

A

incompressible
rigid tight particles
particles vibrate
FIXED VOLUME
FIXED SHAPE

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11
Q

Liquid

A

incompressible
loosely packed particles
particles move
NOT FIXED SHAPE
FIXED VOLUME

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12
Q

Gases

A

compressible
particles move freely
NOT FIXED SHAPE
NOT FIXED VOLUME

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13
Q

matter has 2 categories

A

pure substance, mixture

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14
Q

pure substances

A

have fixed properties; uniform unchanging composition

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15
Q

mixtures

A

has properties that vary; combo of 2 or more substances

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16
Q

Physical Property

A

a characteristic that can be observed or measured but does NOT change the sample
Eg; mass, volume, compressibility, density, melting and boiling pt

17
Q

intensive properties

A

does not depend of amt of substance present
eg; visocity, color, density

18
Q

extensive property

A

depend on amt of substance present

19
Q

chemical property

A

describes substances ability to combine or change into diff substance Eg; corrosion reactivity flammability

20
Q

chemical change

A

one or more substance that undergoes a change in composition, to form new substance
eg; cooking, combustion, oxidation, tarnish
SEVERAL INDICATORS: Color change, gas evolution, energy change eg; burning wood, fireworks, vinegar baking soda, rot banana

21
Q

endothermic

A

a chemical reaction that absorbs energy; environment feels cold

22
Q

exothermic

A

a chemical reaction releasing energy; environment feels hot

23
Q

Physical change

A

change physical appearance but NOT the composition Eg; melting, chopping, shredding paper,

Chemistry (1 decks)

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