C3

Question 1

Are electrons positively or negatively charged?

Answer 1

Negatively (-)

Question 2

How are positive (+) ions formed?

Answer 2

When atoms lose electrons

Question 3

How are negative (-) ions formed?

Answer 3

When atoms gain electrons

Question 4

What do you get when one or more atoms are joined together?

Answer 4

Molecules and compounds

Question 5

What is a compound?

Answer 5

A substance made up of different types of atom.

Question 6

What do atoms use to join together?

Answer 6

Chemical bonds

Question 7

What are the 2 main type of bonds between atoms?

Answer 7

Ionic and covalent

Question 8

What is the molecular formula for Carbon Dioxide?

Answer 8

CO 2

Question 9

What is the molecular formula for Hydrogen?

Answer 9

H 2

Question 10

What is the molecular formula for Hydrochloric acid?

Answer 10

HCl

Question 11

What is the molecular formula for Calcium carbonate?

Answer 11

CaCO 3

Question 12

What is the molecular formula for Water?

Answer 12

H 2 O

Question 13

In an exothermic reaction, is energy taken in or given out?

Answer 13

Given out

Question 14

In an endothermic reaction, is energy taken in or given out?

Answer 14

Taken in

Question 15

If you see an increase in temperature in a reaction, is it exothermic or endothermic?

Answer 15

Exothermic - heat is given out

Question 16

If you see a drop in temperature in a reaction, is the reaction exothermic or endothermic?

Answer 16

Endothermic - heat is taken in

Question 17

Energy must be taken in to break old bonds, so bond breaking is a __________ process

Answer 17

Endothermic

Question 18

Energy is given out when new bonds are made, so bond making is a __________ process

Answer 18

Exothermic

Question 19

What is the limiting reactant?

Answer 19

What causes the reaction to stop because it is used up

Question 20

More collisions __________ the rate of reaction

Answer 20

Increase

Question 21

Increasing the __________ increases the rate of reaction

Answer 21

Temperature

Question 22

Why does using smaller particles increase the rate of reaction?

Answer 22

There is a larger surface area

Question 23

What is a catalyst?

Answer 23

A substance which increases the speed of a reaction

Question 24

In the periodic table the elements have 2 numbers, what is the bigger one called?

Answer 24

Relative atomic mass

Question 25

In a reaction no _____ is lost, and no _____ is gained.

Answer 25

Mass

Question 26

If you double the ___________, you double the _________

Answer 26

Reactant, product

Question 27

What is atom economy?

Answer 27

The % of reactants changed into useful products

Question 28

What is the equation for atom economy?

Answer 28

Mr of desired product / Mr of all products x 100

Question 29

What is 'predicted yield' ?

Answer 29

How much product you expect to get

Question 30

What is the equation for percentage yield?

Answer 30

Actual yield (g) / predicted yield (g) x 100

Question 31

What are up to 4 ways you can lose reactant or product along the way in a reaction?

Answer 31

Evaporation, filtration, transferring liquids and not everything will react to make product.

Question 32

What is a continuous production?

Answer 32

A production that never stops

Question 33

What is batch processes?

Answer 33

When chemicals are made only when needed, this means the process isn't running all the time.

Question 34

What are some things that increase the cost of making Pharmaceutical Drugs?

Answer 34

Research, raw materials, marketing and time taken for development.

Question 35

What is an allotrope?

Answer 35

Is a different structural form of the same element in the same physical state e.g both solids

Question 36

What are 2 properties of diamond?

Answer 36

Very hard, and has a high melting point.

Question 37

What are 2 properties of graphite?

Answer 37

Conducts electricity, and it's slippery.