3.1 Introduction

Question 1

define element

Answer 1

substance containing only one type of atom

Question 2

What can elements be categorised into?

Answer 2

metals and non-metals

Question 3

Describe the chemical test for water

Answer 3

anhydrous copper sulphate
white to blue

Question 4

Describe the chemical test for water

Answer 4

boiling point : 100C
melting point : 0C

Question 5

What side are non-metals on in the periodic table?

Answer 5

right hand side

Question 6

What side are metals on in the periodic table?

Answer 6

left hand side

Question 7

What is a diatomic element?

Answer 7

element that exists in pairs

Question 8

What direction do periods go in?

Answer 8

horizontal

Question 9

What direction do groups go in?

Answer 9

vertical

Question 10

What does a period have in common?

Answer 10

number of electron shells

Question 11

What does a group have in common?

Answer 11

number of electrons in outer shell

Question 12

Define compound

Answer 12

substance containing more than one type of atom, chemically bonded together

Question 13

Describe the chemical test for carbon dioxide

Answer 13

calcium hydroxide (limewater)
cloudy/milky as a result of calcium carbonate produced

Question 14

What are the properties of a compound?

Answer 14

compound usually has completely different properties to elements its made up of

Question 15

What are the three types of compound?

Answer 15

metallic
ionic
covalent

Question 16

Why does ammonium chloride form closer to the hydrogen chloride than the ammonia?

Answer 16

hydrogen chloride molecules are heavier so diffuse slower

Question 17

Define solute

Answer 17

substance going to be dissolved

Question 18

Define solvent

Answer 18

liquid going to do the dissolving

Question 19

Define solution

Answer 19

resulting mixture of solute dissolved in solvent

Question 20

Define saturated

Answer 20

solution in which no more solute can be dissolved

Question 21

Define suspension

Answer 21

solid floating in a liquid because it cannot dissolve

Question 22

Define soluble

Answer 22

substance that can be dissolved

Question 23

Define insoluble

Answer 23

substance that cannot be dissolved

Question 24

What do we measure solubility in?

Answer 24

g per 100g of solvent

Question 25

What does the line mean on solubility curves?

Answer 25

saturated
maximum mass dissolved

Question 26

What does below the line mean on solubility curves?

Answer 26

soluble
less than maximum mass dissolved

Question 27

What does above the line mean on solubility curves?

Answer 27

insoluble
more than maximum mass that can be dissolved