unit 2- matter

Question 1

Pure substance

Answer 1

cannot be seperated by physical means

Question 2

Pure substances-

Answer 2

Elements and compounds

Question 3

Simplest substances

Answer 3

Element

Question 4

Element

Answer 4

contains only one type of atom

Question 5

Each element can be identified by its…..

Answer 5

Physical and Chemical properties

Question 6

Compounds

Answer 6

Contains 2 or more types of atoms in whole number ratios

Question 7

A compound may be represented by..

Answer 7

A chemical formula

Question 8

Chemical formula

Answer 8

the elements in the compound amd ratio of atoms

Question 9

Mixture

Answer 9

made of two or more substances- elements,compounds, or both, that are not chemiclaly combined

Question 10

Homogenous mixture

Answer 10

Substances are so evenly mixed that you can’t see the different parts

Question 11

Example of homogeneous

Answer 11

Salt dissolved in water

Question 12

Heterogenous mixture

Answer 12

You can see the different parts of the mixture

Question 13

Can seperate mixutres by..

Answer 13

using magnetic attraction, filtration, distillation and evaporation

Question 14

Suspension - example

Answer 14

Itlaian Dressing, ketchup, muddy water

Question 15

Suspension

Answer 15

Very large particle size, usually settles down

Question 16

Colloids

Answer 16

Medium size particles, need a mciroscope to see the particles

Question 17

Example of colloids

Answer 17

Milk, cheese, whipped cream

Question 18

tyndall effect

Answer 18

particles that scatter light

Question 19

Homogenous mixture extra information

Answer 19

Tiniest particles, uniform appearance, doesn’t seperate out

Question 20

Solute

Answer 20

the thing dissolving

Question 21

Solvent

Answer 21

the liquid in which the solute dissolves in; the greater amount

Question 22

Contains 2 or more types of atoms in whole number ratios

Answer 22

compounds