Chemistry Unit Review

Question 1

State the 5 parts of particle theory of matter

Answer 1

1 matter is made up of tiny particles
2. All particles of one substance are the same
3. Particles are always in motion
4. Particles are separated by empty space
5. Particles are attracted to each other

Question 2

Define chemistry

Answer 2

The study of matter and the changes it undergoes

Question 3

What is matter?

Answer 3

Anything that has mass and volume takes up space)

Question 4

How do particles move?
Solids-
Gases-

Answer 4

Solids- vibrate in a fixed position
Gases - fastest moving

Question 5

Atoms cannot be

Answer 5

Broken down into a smaller unit

Question 6

Matter = pure substance, mixture
Pure substance = element, compound
Mixture = solution (homo mix), mechanical mixture (hetero Mix)

Question 7

Pure substance

Answer 7

Contains only one kind of particle
Components can’t physically separate

Question 8

Elements

Answer 8

Pure substance containing atoms that are all The same
Can’t be broken down by ordinary chemical methods

Question 9

Compounds

Answer 9

Pure substances containing atoms of 2+ elements held together by bonds

Question 10

Mixture

Answer 10

2+ pure substances keeping their own physical and chemical properties

Question 11

Solution

Answer 11

A phase
Too small too see

Question 12

Mechanical mixture

Answer 12

More than 1 phase
Can be seen

Question 13

What are physical properties?

Answer 13

Physical description of a substance that can help identify it

Question 14

What are chemical properties?

Answer 14

The behaviour of a substance as it becomes a new substance

Question 15

Five indicators that a chemical change has occurred?

Answer 15

1. Change of Color
2. Change of odour
3. Heat/light given off or absorbed
4. Gas formed
5. Precipitate solid forms

Question 16

Where are the metals located on the periodic table?

Answer 16

On the left side of the staircase

Question 17

Where are nonmetals located on the periodic table?

Answer 17

On the right side of the staircase

Question 18

What does an atom have to do to become an ion

Answer 18

Have a full valence orbit

Question 19

In the following compound describe the various numbers represent
4Cu(NO )
3 2

Answer 19

4- Coefficient indicates a number of molecules
3- Subscript number of atoms in a molecule
2- Subscript outside the bracket multiplies items inside bracket 

Question 20

What are the seven diatomic elements

Answer 20

1. H2
2. N2
3. O2
4. I2
5. F2
6. Cl2
7. Br2

Question 21

The materials to start with an a chemical reaction are called the

Answer 21

Reactants

Question 22

The materials you end up with in a chemical reaction are called the

Answer 22

Products

Question 23

How does a molecular compound form

Answer 23

Like Euler compounds formed by sharing balance electrons between nonmetal atoms

Question 24

How does a ionic compound formed

Answer 24

Ionic compound forms between metal and nonmetal atoms

Question 25

How do you know that a compound is ionic

Answer 25

It has a full valance orbit