Classification of matter

Question 1

How is matter classified?

Answer 1

1. physical state (solid, liquid, gas)
2. composition (element, compound or mixture)

Question 2

What are the properties of solids ?

Answer 2

1. definite shape and definite volume
2. particles are close togethe in fixed positions, vibrate but do not move
3. crystalline structure

Question 3

What are the properties of liquids?

Answer 3

1. definite volume and take the shape of the container
2. particles are still close together and move while touching each other
3. no regular pattern or arrangement of particles

Question 4

What are the properties of gases?

Answer 4

1. no definite volume and shape of their own
2. particles are very far apart, spread all over
3. total disorder

Question 5

How are pure substances classified?

Answer 5

elements and compounds

Question 6

Pure substances

Answer 6

distinct properties and composition

Question 7

elements

Answer 7

can not be broken down (114 elements)

Question 8

compounds

Answer 8

2 or more elements (constant composition)

Question 9

How can water be decomposed?

Answer 9

Water can be decomposed into its elements by passing through an electric current

Question 10

What is the law of constant composition/ definite proportions?

Answer 10

1. Joesph Louis 1800s found it
2. pure compounds are always the same
3. difference between lab made and nature
4. pure compound is same throughout

Question 11

mixtures

Answer 11

1. 2 or more substances ( vary in composition)

Question 12

What are the substances that makes up mixtures?

Answer 12

components of mixture

Question 13

what are two types of mixtures?

Answer 13

1. heterogenous - not same throughout
2. homogenous mixtures - uniform
3. solutions are homogenous