Unit 1

Question 1

What is the mass number equal to?

Answer 1

Protons + neutrons

Question 2

What are the neutrons equal to?

Answer 2

Mass - atomic OR mass - protons

Question 3

What is an isotope?

Answer 3

Atoms with the same number of protons but a different number of neutrons

Question 4

How do you calculate the average rate of reaction?

Answer 4

Change in volume / change in time

Question 5

Give examples of how a reaction can be made faster

Answer 5

Bigger surface area, higher temperature, higher concentration, catalyst

Question 6

On a reaction rate graph what indicates a faster reaction rate?

Answer 6

Steeper slope

Question 7

Covalent molecular bonding is between what?

Answer 7

Non-metals

Question 8

Covalent network bonding is between what?

Answer 8

Non-metals (B,C,Si)

Question 9

Ionic bonding is between what?

Answer 9

Metal + non-metal

Question 10

Metallic bonding is between what?

Answer 10

Metals

Question 11

In a covalent molecular, what forces hold the molecules together?

Answer 11

Weak Van der Waals forces

Question 12

Covalent molecular share what to form full outer shells?

Answer 12

Unpaired outer electrons

Question 13

In a covalent molecular what holds the atoms together?

Answer 13

Attraction of two positive nuclei

Question 14

Do covalent molecular conduct?

Answer 14

No

Question 15

Do CM dissolve in water?

Answer 15

No

Question 16

Do CM have a high or low melting/boiling point?

Answer 16

Low

Question 17

Do CN conduct?

Answer 17

No

Question 18

Do CN dissolve in water?

Answer 18

No

Question 19

Do CN have a high or low melting/boiling point?

Answer 19

High

Question 20

Do IL conduct?

Answer 20

Yes in molten or solution

Question 21

Do IL dissolve in water?

Answer 21

Yes

Question 22

Do IL have a high or low melting/boiling point?

Answer 22

High

Question 23

How do you calculate relative atomic mass?

Answer 23

Total mass of 100 atoms/ 100 (See ring binder for example)

Question 24

How does an acid form?

Answer 24

Non-metal oxide + water -> acid

Question 25

How does an alkali form?

Answer 25

Metal oxide + water -> alkali

Question 26

What is electrolysis?

Answer 26

When current/electricity is passed through a solution and breaks it up (ions are free to move)

Question 27

Why do substances conduct electricity?

Answer 27

The ions are free to move

Question 28

What is neutralisation?

Answer 28

When the H+ ions of an acid or the OH- ions of an alkali are removed to give a solution with a pH of 7

Question 29

Acid + alkali -> ?

Answer 29

Salt + water

Question 30

Acid + metal oxide -> ?

Answer 30

Salt + water

Question 31

Acid + metal carbonate -> ?

Answer 31

salt + water + CO2

Question 32

Acid + MAZIT metal -> ?

Answer 32

Salt + hydrogen

Question 33

When an acid is diluted what happens?

Answer 33

• pH increases towards neutral
• acidity decreases
• concentration of H+ ions decrease

Question 34

When an alkali is diluted what happens?

Answer 34

• pH decreases towards 7
• alkalinity decreases
• concentration of OH- ions decrease

Question 35

What are spectator ions?

Answer 35

Ions which do not take part in a chemical reaction

Question 36

What experiment is carried out for neutralisation?

Answer 36

Volumetric titration

Question 37

What is added to a titration to show neutralisation?

Answer 37

Indicator

Question 38

In a titration what is used to measure the acid?

Answer 38

Burette

Question 39

In a titration what is the alkali added with?

Answer 39

A pipette

Question 40

What is the atomic number equal to?

Answer 40

Protons, electrons