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Science > Chapter 3 > Flashcards

Chapter 3 Flashcards

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Biology 101 flashcards
0
Q

Pure substance

A

Only one type of particle

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1
Q

What is an element

A

Hey pure substance that cannot be separated into simpler substances by physical or chemical means

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2
Q

Why does an hot air balloon go up on release

A

Helium is less dense than air

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3
Q

How are elements classified

A

Groups according to shared properties

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4
Q

What are elements divided into

A
  • metals
  • non metals
  • metalloids
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5
Q

Metals

A
  • shiny
  • good conductors of thermal energy and electric current
  • malleable
  • ductile
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6
Q

Nonmetals

A
  • dull
  • poor conductors of thermal energy and electric current
  • brittle
  • unmalleable
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7
Q

Metalloids

A
  • semi conductors

- properties of both metal and non metal

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8
Q

Compound

A

Pure substance composed of two or more elements that are chemically combined

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9
Q

What has to happen for the elements to combine

A

They must react or undergo the chemical change

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10
Q

What happens when a compound forms

A

The elements join a specific ratio according to their masses

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11
Q

Can compounds be broken down by physical changes

A

No

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12
Q

Mixture

A

Combo of two or more substances that are not chemically combined

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13
Q

Mixture that appears to be a single substance but is composed of particles of two or more substances that are spread evenly amongst eachother

A

Solution

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14
Q

Substance that is dissolved

A

Solute

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15
Q

Substance in which the solute is dissolved

A

Solvent

16
Q

A measure of the amount of solute dissolved in a solvent

A

Concentration

17
Q

Amount of a solute needed to make a saturated solution using a given amount of solvent at a certain temperature.

A

Solubility

18
Q

Mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough to settle out

A

Suspension

19
Q

Mixture in which particles are dispersed throughout but aren’t heavy enough to settle out

A

Colloid

20
Q

What are some ways you can separate a mixture

A

Filteration and evaporation

21
Q

Can the components of a mixture be mixed in any proportion

A

Yes

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