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Chemistry > Ch. 3 Matter- Properties And Change > Flashcards

Ch. 3 Matter- Properties And Change Flashcards

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1
Q

Matter

A

Is anything with mass and volume

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2
Q

Substance

A

Is a form of matter with a uniform and unchanging composition

They also have specific numbers changing PROPERTIES that can be observed

They have both physical and chemical properties

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3
Q

Physical properties

A

Can be observed without changing a substances chemical composition

Ex: are color, hardness, and density

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4
Q

Chemical properties

A

Can’t be observed without changing the composition of a substance

Ex: is the tendency of iron to form rust when exposed to air

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5
Q

Ex of physical properties

A
  1. Chemical formula H2O
  2. Colorless
  3. Solid at normal temperatures and pressures
  4. Melting point
  5. Conducts electricity
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6
Q

Chemical properties

A
  1. Forms green carbonate when exposed to moist air
  2. Remains unchanged when in the presence of nitrogen
  3. Ability to combine with another substance
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7
Q

True or false ?

All matter that we encounter in everyday life exist in one of three physical forms

A

True

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8
Q

True or false ?

A solid has definite shape and volume

A

True

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9
Q

True or false ?

A liquid has a definite shape takes on the volume of its container

A

False

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10
Q

True or false ?

A gas has both the shape and the volume of its container

A

True

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11
Q

True or false ?

The particles in a gas can’t be compressed into a smaller volume

A

False

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12
Q

True or false ?

Liquids tend to contract when heated

A

False

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13
Q

True or false ?

The particles In a solid are spaced far apart

A

False

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14
Q

True or false ?

The words gas and vapor can be used interchangeably

A

False

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15
Q

Physical changes include :

A
  1. Boil
  2. Freeze
  3. Condense
  4. Vaporize
  5. Melt
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16
Q

Chemical changes include :

A
  1. Explode
  2. Rust
  3. Oxidize
  4. Burn
  5. Rot
17
Q

Chemical change

A

A chemical reaction that involves one or more substances changing into new substances

18
Q

Reactants

A

The starting substances in a chemical reaction

19
Q

Products

A

The new substances that are formed in a chemical reaction

20
Q

Chemical equation

A

Shows the relationship between the reactants and products in a chemical reaction

21
Q

Law of conservation of mass

A

States that mass is neither created nor destroyed in any process

22
Q

Filtration

A

Separates solids from liquids by using porous barrier

23
Q

Distillation

A

Separates substances on the basis of the boiling points of the substances

24
Q

Crystallization

A

Separates by formation of solid, pure particles from a solution

25
Q

Chromatography

A

Separates substances based on their movement through a special paper

26
Q

Element

A

A substance that can’t be separated into simpler substances by physical or chemical means

27
Q

Compound

A

A chemical combination of two or more different elements

28
Q

Ex of an element

A

Is oxygen

29
Q

Ex of a compound

A

Aspirin

30
Q

Periods

A

Horizontal rows in the periodic table

31
Q

Groups or families

A

Vertical columns in a periodic table

32
Q

Ex of elements

A
  1. Silicon
  2. Francium
  3. Nickel
33
Q

Ex of a compound

A
  1. Sodium chloride

2. Ice

Chemistry (13 decks)

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