chem unit 1 test Flashcards

1
Q

element

A

all atoms are the same

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2
Q

solid

A

atoms vibrate in one position (not free)

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3
Q

pure substance

A

made up of only one MATERIAL

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4
Q

what is the diff between an element and a pure substance?

A

all elements are pure substances
pure substance can be elements OR compounds

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5
Q

molecule

A

two+ atoms are chemically joined to make a molecule

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6
Q

compound

A

chemically combined 2 different atoms

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7
Q

liquid

A

molecules are relatively close and free; moving about randomly and slowly

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8
Q

gas

A

molecules are far apart and moving fast

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9
Q

mixture

A

diff types of atoms/molecules that are physically together but not chemically bonded

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10
Q

homo mixture

A

you can not physically see that it is NOT a mixture

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11
Q

hetero mixture

A

you can physically see that is IS a mixture

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12
Q

sig figs

A

the digits in a number that matter for showing how precise the measurement is

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13
Q

mass unit

A

g, mg, kg,

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14
Q

density unit

A

g/cm^3 or g/mL

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15
Q

volume unit

A

cm^3, m^3, mL,L

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16
Q

length, width, height

A

in, cm, m, ft, yard, mile

17
Q

0.1 estimate to —>

A

0.01

18
Q

1 estimate to —>

A

0.1

19
Q

10 estimate to —>

A

1

20
Q

density

A

m/v

21
Q

matter

A

anything that takes up space

22
Q

mass

A

a measure of the quantity of matter within an object

23
Q

weight

A

measure of the gravitational pull on the matter within an object

24
Q

would weight change if you were on mars versus if you were on earth? would mass?

A

weight would change
mass would not