Understanding Matter

Question 1

Matter

Answer 1

Anything that occupies space and has mass

Question 2

Properties of Matter

Answer 2

1. Made up of small particles which are in constant motion
2. Every particle of matter has the same properties
3. There are gaps between the particles of matter
4. Particles of matter are held together by a chemical bond

Question 3

Pure Substance

Answer 3

A substance that has a definite and constant composition

Question 4

What happens when a substance changes state?

Answer 4

The spacing between the particles of the substance is changing due to a gain or loss of energy

Question 5

Give an example of a pure substance

Answer 5

Salt / Sugar

Question 6

Pure substances can be classified as…

Answer 6

elements or compunds

Question 7

Element

Answer 7

A substance that cannot be broken down into simpler substances by chemical or physical means

Question 8

Compound

Answer 8

A substance that is made up of two or more elements combined together chemically in a specific ratio

Question 9

Mixture

Answer 9

A physical combination of pure substances that has no definite or constant composition

Question 10

Heterogenous Mixture

Answer 10

Mixture in which the composition of the solute is not uniform throughout the mixture

Question 11

Homogenous Mixture

Answer 11

Mixture in which the composition of the solute is uniform throughout the mixture

Question 12

Give an example of a HOMOGENOUS mixture

Answer 12

Saltwater / Coffee and Milk / Air

Question 13

Give an example of a HETEROGENOUS mixture

Answer 13

Oil and Water / Sugar and Sand

Question 14

Suspension

Answer 14

Cloudy and heterogenous mixture in which the solute particles do not dissolve but remain suspended within

Question 15

Solute

Answer 15

Substance which is dissolved

Question 16

Solvent

Answer 16

Substance in which solute is dissolved

Question 17

Miscibility

Answer 17

The complete dissolution of one liquid in another

Question 18

Solubility

Answer 18

The ability to dissolve

Question 19

Solution

Answer 19

Homogenous mixture of two or more substances

Question 20

Colloid

Answer 20

A type of mixture intermediate between a homogenous mixture and a heterogenous mixture with properties also intermediate between the two

Question 21

How can colloids be distinguished from solutions?

Answer 21

Using the Tyndall effect

Question 22

7 Properties of METALS

Answer 22

1. Have a metallic luster
2. Generally solids at room temp
3. Malleable and Ductile
4. Conduct heat and electricity
5. Exist as extended planes of atoms
6. Combine with other metals to form alloys which have metallic characteristics
7. Form positive ions

Question 23

7 Properties of NON METALS

Answer 23

1. Rarely have a metallic luster
2. Generally gases at room temp
3. Neither malleable nor ductile
4. Poor conductors of heat and electricity
5. Usually exist as molecules in their elemental form
6. Combine with other non metals to form covalent bonds
7. Form negative ions

Question 24

3 Properties of METALLOIDS

Answer 24

1. Appear lustrous
2. Neither malleable nor ductile
3. Poorer conductor of heat and electricity than metals

Question 25

Which 8 elements are METALLOIDS?

Answer 25

Boron (B)
Silicon (Si)
Germanium (Ge)
Arsenic (As)
Antimony (Sb)
Tellurium (Te)
Polonium (Po)
Astatine (At)

Question 26

Where are metalloids useful?

Answer 26

Semiconductors, electronics