Mixtures, Compounds and Elements

Question 1

Mixture

Answer 1

Two or more substances combined but not bonded to each other

Question 2

Element

Answer 2

A substance containing only one type of atom

Question 3

Compound

Answer 3

A substance containing only one type of molecule. The molecule MUST contain 2 or more different types of atoms.

Question 4

Atom

Answer 4

The smallest unit of an element that still maintains the properties of the element.

Question 5

Molecule

Answer 5

Two or more atoms bonded to each other. The atoms may be the same making it an element. The atoms may be different making it a compound.

Question 6

Chemical Bond

Answer 6

The link that holds two atoms together in a molecule. Caused by the sharing of electrons.

Question 7

Pure Substance

Answer 7

A substance where all of the atoms are the same OR all of the molecules are the same. This includes both elements and compounds.

Question 8

Oxygen gas (O2) is a mixture, compound or element?

Answer 8

Element

Question 9

Carbon dioxide gas (CO2) is a mixture, compound or element?

Answer 9

Compound

Question 10

Helium gas (He) is a mixture, compound or element?

Answer 10

Element

Question 11

Nitrogen gas (N2) is a mixture, compound or element?

Answer 11

Element

Question 12

Sucrose (C6H12O6) is a mixture, compound or element?

Answer 12

Compound

Question 13

Amonia (NH3) is a mixture, compound or element?

Answer 13

Compound

Question 14

Methane (CH4) is a mixture, compound or element?

Answer 14

Compound

Question 15

Heterogeneous Mixture

Answer 15

Not well mixed. You can see the separate parts. Ex. Salad, dirt, pizza, cement.

Question 16

Homogeneous Mixture

Answer 16

Very well mixed. You cannot see the separate parts. Ex. Milk, Salt water, Air

Question 17

Solution

Answer 17

The most well mixed of the homogeneous mixtures. They appear clear. They consist of two parts, the solvent and the solute.

Question 18

Solvent

Answer 18

Part of a solution. Does the dissolving. Ex. Water

Question 19

Solute

Answer 19

Part of a solution. Gets dissolved. Ex. Salt, Sugar, Caffeine

Question 20

Soluble

Answer 20

A property of matter. Describes something that is “able” to be dissolved.

Question 21

Insoluble

Answer 21

A property of matter. Describes something that cannot be dissolved.

Question 22

Solubility

Answer 22

A measurement of how well something dissolves.

Question 23

List 4 ways to cheat in a solubility race.

Answer 23

Use less solute; use more solvent; use hot water; give your opponent something that is insoluble.

Question 24

What kind of mixture is saliva and sugar?

Answer 24

Homogeneous mixture

Question 25

What kind of mixture is water and salt?

Answer 25

Homogeneous mixture

Question 26

What kind of mixture is sand, salt and iron?

Answer 26

Heterogeneous mixture

Question 27

What kind of mixture is gum?

Answer 27

Homogeneous mixture

Question 28

What kind of mixture is pizza?

Answer 28

Heterogeneous mixture

Question 29

Chemical Change

Answer 29

A change in matter where a new substance is created from another substance or substances. The properties of the materials change.

Question 30

Something new is created. Is this is a sign of a chemical or physical change?

Answer 30

Chemical Change

Question 31

Heat changes from room temperature. Is this is a sign of a chemical or physical change?

Answer 31

Chemical Change

Question 32

Gas is emitted. Is this is a sign of a chemical or physical change?

Answer 32

Chemical Change....unless... It is a phase change then it is physical. A phase change does not change the molecule.

Question 33

Corrosion. Is this is a sign of a chemical or physical change?

Answer 33

Chemical Change

Question 34

Atoms or molecules move from one place to another. Is this is a sign of a chemical or physical change?

Answer 34

Physical Change

Question 35

An object changes phase. Is this is a sign of a chemical or physical change?

Answer 35

Physical Change

Question 36

Chemical bonds are broken. Is this is a sign of a chemical or physical change?

Answer 36

Chemical Change

Question 37

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

Answer 37

Element made of molecules. Pure substance.

Question 38

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

Answer 38

Compound, Pure Substance

Question 39

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

Answer 39

Mixture...it is composed of two elements

Question 40

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

Answer 40

Mixture of two compounds

Question 41

Which of the following words apply to this image (you may choose more than one)? Element, Compound, Mixture, Pure Substance

Answer 41

Mixture of elements and compounds

Question 42

Is this an element or a compound?

Answer 42

Element: both atoms are the same

Question 43

Is this a molecule?

Answer 43

Yes

Question 44

Is this an element or a compound?

Answer 44

Compound: There are two different elements shown here.

Question 45

Is this an element or a compound?

Answer 45

Compound

Question 46

Are these molecules?

Answer 46

Yes. There are three molecules. NOTE: These molecules are of a compound, because the atoms are from different elements.

Question 47

Is this an element or a compound?

Answer 47

Compound

Question 48

Is this an element or a compound?

Answer 48

Element: all atoms are the same

Question 49

Does this show molecules?

Answer 49

No. Molecules must be two or more atoms bonded together.

Question 50

Is this a chemical change or a physical change happening?

Answer 50

Chemical: bonds are being broken and made; new products are produced

Question 51

Is this a chemical change or a physical change happening?

Answer 51

Chemical: bonds are being broken and made; new products are produced

Question 52

Heat is being added to the H₂O inside the flask. Is this a chemical change or a physical change happening?

Answer 52

Physical: No bonds are breaking; phase change just moves the molecules around; no new products are created