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Chemistry R120 > Chapter 1 > Flashcards

Chapter 1 Flashcards

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1
Q

What is matter?

A

anything that has mass and occupies space

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2
Q

What are atoms?

A

building blocks of matter

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3
Q

What are molecules?

A

2 or more atoms joined together

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4
Q

What is the relationship between atoms and elements?

A

elements are composed of a unique kind of atom

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5
Q

What does “properties” mean?

A

description of matter that allows us to distinguish different types of matter

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6
Q

What are the 2 types of properties?

A

physical and chemical

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7
Q

What are the monoatomic elements?

A

noble gases

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8
Q

What are the diatomic molecules?

A

H, N, F, O, I, Cl, Br

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9
Q

How are heterogenous mixtures separated?

A

filtration

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10
Q

How are homogenous mixtures separated?

A

distillation

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11
Q

What does chemistry mean?

A

study of matter, its properties, adn the changes that matter undergoes

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12
Q

What is physical properties?

A

can be observed or measured without changing the composition OR the identity of the substance

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13
Q

What are the 2 types of physical properties?

A

intensive and extensive

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14
Q

What is an extensive physical property?

A

physical property that depends on the amount of substance; ie: weight or volume

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15
Q

What is an intensive physical property?

A

physical property that is independent on the amount of substance; ie: boiling/freezing pt, density, color, smell, hardness

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16
Q

What is chemical property?

A

describes a way the substance may change or react to form other substances; ie: combustibility, finert, corrosive | changes the identity of the substance, the “who they are”

17
Q

What are physical changes?

A

substance changes in APPEARANCE not in composition | | changes of state (ie: breaking glass, melting solids to liquids, cutting a log)

18
Q

What are chemical changes?

A

substance is transformed into a chemcially different substance | any chemical reactions (ie: iron rusts)

19
Q

What are elements?

A

composed of one kind of atom | substances that cannot be decomposed into simpler substances (it is as simple as they get)

20
Q

What are compounds?

A

substances of 2+ ELEMENTS (ie: H2O)

21
Q

What are mixtures?

A

combinations of 2+ SUBSTANCES | each substance keeps their chemical identity

22
Q

What does chemical identity mean?

A

the specific characteristics that make the element/substance what it is | the “who” is the chemical/substance

23
Q

How many grams is in 1 lb?

A

1 lb = 454 g

24
Q

How many meters are in 1 mL?

A

1 mL = 1 cm^3

25
Q

How many cm are in 1 in?

A

1 in. = 2.54 cm

Chemistry R120 (18 decks)

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