AQA CHEMISTRY Key words

Question 1

Acid

Answer 1

A solution that has a low pH due to the hydrogen ions

Question 2

Activation

energy

Answer 2

The energy needed to start reaction

Question 3

Alkali

Answer 3

A solution that has a high pH due to hydroxide ions

Question 4

Alkali metal

Answer 4

Highly reactive metals found on the left-hand side of the periodic table

Question 5

Alkanes

Answer 5

Hydrocarbon containing only single bonds

Question 6

Alkenes

Answer 6

Hydrocarbon containing double bonds

Question 7

Alloy

Answer 7

Mixture of atoms that lead to distorted layers that cannot slide

Question 8

Atom

Answer 8

Small part of matter, made up from a mixture of protons, neutrons and
electrons

Question 9

Atom economy

Answer 9

A way of determining how many of the reactant atoms made it into the desired
product

Question 10

Atomic number

Answer 10

The number of protons in an atom

Question 11

Bioleaching

Answer 11

Mining low yield ores using bacteria

Question 12

Boiling point

Answer 12

Point at which a liquid turns into a gas

Question 13

Bromine water

Answer 13

Orange liquid that can be used to test for double bonds

Question 14

Carbon footprint

Answer 14

The atom of carbon that is released into the atmosphere based on your daily
activities

Question 15

Catalyst

Answer 15

Something that speeds up a rate of reaction without being used up

Question 16

Chromatography

Answer 16

Method of separating out mixtures

Question 17

Combustion

Answer 17

Burning of a compound in oxygen

Question 18

Compound

Answer 18

Two or more elements chemically bonded together

Question 19

Covalent bonding

Answer 19

Sharing of electron between two non-metals

Question 20

Cracking

Answer 20

Breaking a long hydrocarbon chain to short hydrocarbon chains

Question 21

Crude oil

Answer 21

A mixture of different length hydrocarbon chains made from decomposing
dead plant and animals

Question 22

Desalination

Answer 22

Removal of salt from water

Question 23

Diamond

Answer 23

Giant covalent compound where each carbon atom makes four bonds

Question 24

Displacement

Answer 24

A type of reaction where one element replaces another in a compound

Question 25

Electrolysis

Answer 25

Separating compounds using electricity

Question 26

Electron

Answer 26

Found in the shells around the nucleus, has a charge of minus one and no mass

Question 27

Element

Answer 27

``` Group of (or single) atoms that all have the same chemical characteristics, can be found on the periodic table ```

Question 28

Endothermic

Answer 28

A reaction that takes in energy

Question 29

Exothermic

Answer 29

A reaction that releases energy

Question 30

Flammability

Answer 30

The tendency for a substance to catch fire

Question 31

Formulation

Answer 31

Mixture of compounds

Question 32

Fractional | distillation

Answer 32

Separating out a mixture of different length hydrocarbon chains based upon boiling point

Question 33

Gas

Answer 33

A state of matter where the atoms move atom in a fast and random matter, can be compressed and flow

Question 34

Graphite

Answer 34

Giant covalent compound where each carbon atom makes three bonds

Question 35

Greenhouse gas

Answer 35

Gas that traps infra-red radiation

Question 36

Halogen

Answer 36

Highly reactive non-metals found on the right-hand side of the periodic table

Question 37

Hydrocarbon

Answer 37

A compound that only has carbon and hydrogen in it

Question 38

Ion

Answer 38

Atoms that has lost or gained electrons

Question 39

Ionic bonding

Answer 39

Transfer of electrons between a metal and a non-metal

Question 40

Liquid

Answer 40

A state of matter, where the atoms can move and flow but they cannot be compressed

Question 41

Mass number

Answer 41

The number of protons and neutrons in an atom

Question 42

Melting point

Answer 42

Point at which a solid turns into a liquid

Question 43

Metal

Answer 43

On the left-hand side of the periodic table, form positive ions

Question 44

Mixture

Answer 44

Lots of different elements that may or may not be chemically bonded together

Question 45

Mole

Answer 45

The molecular mass in grams

Question 46

Neutralization

Answer 46

Mixing of an acid and an alkali to give a pH of 7

Question 47

Neutron

Answer 47

Found in the nucleus of atoms, has no charge and a mass of one

Question 48

Nobel gas

Answer 48

Unreactive gases found on the right of the periodic table

Question 49

Non-metal

Answer 49

On the right-hand side of the periodic table, form negative ions

Question 50

Nucleus

Answer 50

In the centre of atoms, contains the protons and the neutrons

Question 51

Oxidation

Answer 51

Loss of electrons

Question 52

Percentage yield

Answer 52

A way of determining how much yield you get from a reaction

Question 53

Periodic table

Answer 53

A way of sorting out the elements

Question 54

pH

Answer 54

How acidic or alkali a solution is

Question 55

Phytomining

Answer 55

Mining low yield ores using plants

Question 56

Portable water

Answer 56

Water that is safe to drink

Question 57

Proton

Answer 57

Found in the nucleus of atoms, has a charge of plus one and a mass of one

Question 58

Reactivity series

Answer 58

List of metals in order of reactivity

Question 59

Reduction

Answer 59

Gain of electrons

Question 60

Reversible | reaction

Answer 60

A reaction that can go in either direction

Question 61

Solid

Answer 61

A state of matter, where the atoms vibrate around a fixed position

Question 62

Titration

Answer 62

Method for determining concentration of solution

Question 63

Transition metal

Answer 63

Group of metal that are in the middle of the periodic table, form colour compounds and can be used as catalysts

Question 64

Viscosity

Answer 64

How easily pourable something is