Ch15 (Glencoe) - Elements, Compounds, and Mixtures Flashcards Preview

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Flashcards in Ch15 (Glencoe) - Elements, Compounds, and Mixtures Deck (44)
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1

Mixture

A sample of matter composed of two or more substances, each of which retains its identity and properties.

2

Compound

A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

 

A compound is always made up of more than one type of atom.  

3

Element

A substance made of a single type of atom.  

4

Pure Substance

A substance made of only one type of atom or one type of molecule

(Example - Pure iron would only contain iron atoms and pure table sugar would only contain sucrose molecules.)

5

Impure substance

A substance containing more than just one type of atom or more than just one type of molecule.  

6

Separation by Physical Means

Separating a mixture into separate parts using only physical means.  Below are some examples.

Sorting

Distilling

Filtering

Crystallizing

Using a magnet

Centrifuging

 

 

7

Solution

A homogeneous mixture of two or more substances.

8

Solvent

A substance, usually a liquid, in which another substance is dissolved, forming a solution.

9

Homogeneous Mixture

A mixture which has the same composition throughout, and the individual parts of the mixture are not easily identifiable.  

(A homogeneous mixture is also referred to as a solution)

10

Heterogeneous Mixture

A mixture of two substances that remain physically separate. 

 

11

Saturated Solution

A solution in which no more solute will dissolve.

12

Solute

The substance that is dissolved in a solution.

(Example, in salt water, the salt is the solute)

13

Suspension

A heterogeneous mixture in which solute-like particles settle out of solvent-like phase if the mixture is allowed to sit around for a while.

14

Unsaturated Solution

A solution that could still dissolve more of the solute.  

15

Mole

A measurement unit in chemistry that provides a bridge between the tiny atom and the realistic amounts of material chemists work with in the lab. 

There are 6.02 x 1023 atomic mass units in one gram.  

Thus, 6.02 x 1023 protons have a mass of one gram. 

(That's A LOT of protons!)

 

16

When a sample of matter appears to be the same throughout, i.e. a single uniform phase even at very high magnification, it is referred to as _________________. 

Homogeneous. 

17

Solid homegenous mixtures of metals are called ___________.

Alloys

18

This is a __________

Compound

&

Pure Substance

19

This is a _________

Pure Substance

an element

20

This is a ____________.

Pure Substance

&

an element

(this is a diatomic element)

21

This is a ______________.

compound

a pure substance

22

This is a ______________.

Mixuture of 

a monoatomic element

a diatomic element

&

a compound

23

This is a ______________.

Homogeneous mixture of two diatomic elements

24

This is a ______________.

Heterogeneous mixture

25

This is a ______________.

Pure substance

&

an element

(this is a monoatomic element)

26

This is a ______________.

Pure substance

an element

(this is a diatomic element)

27

This is a ______________.

Homogeneous mixture of two elements

28

This is a ______________.

Homogeneous mixture of two elements. 

(The purple element is diatomic)

29

This is a ______________.

homogeneous mixture of two diatomic elements.

30

This is a ______________.

Homogeneous mixture of a diatomic element and a compound.