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GCSE Science Key Word > AQA CHEMISTRY Key words > Flashcards

AQA CHEMISTRY Key words Flashcards

1
Q

Acid

A

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

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2
Q

Activation

energy

A

The energy needed to start reaction

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3
Q

Alkali

A

A solution that has a high pH due to hydroxide ions

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4
Q

Alkali metal

A

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

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5
Q

Alkanes

A

Hydrocarbon containing only single bonds

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6
Q

Alkenes

A

Hydrocarbon containing double bonds

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7
Q

Alloy

A

Mixture of atoms that lead to distorted layers that cannot slide

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8
Q

Atom

A

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

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9
Q

Atom economy

A

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

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10
Q

Atomic number

A

The number of protons in an atom

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11
Q

Bioleaching

A

Mining low yield ores using bacteria

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12
Q

Boiling point

A

Point at which a liquid turns into a gas

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13
Q

Bromine water

A

Orange liquid that can be used to test for double bonds

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14
Q

Carbon footprint

A

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

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15
Q

Catalyst

A

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

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16
Q

Chromatography

A

Method of separating out mixtures

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17
Q

Combustion

A

Burning of a compound in oxygen

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18
Q

Compound

A

Two or more elements chemically bonded together

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19
Q

Covalent bonding

A

Sharing of electron between two non-metals

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20
Q

Cracking

A

Breaking a long hydrocarbon chain to short hydrocarbon chains

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21
Q

Crude oil

A

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

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22
Q

Desalination

A

Removal of salt from water

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23
Q

Diamond

A

Giant covalent compound where each carbon atom makes four bonds

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24
Q

Displacement

A

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

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25
Q

Electrolysis

A

Separating compounds using electricity

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26
Q

Electron

A

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

27
Q

Element

A 
Group of (or single) atoms that all have the same chemical characteristics, can
be found on the periodic table
28
Q

Endothermic

A

A reaction that takes in energy

29
Q

Exothermic

A

A reaction that releases energy

30
Q

Flammability

A

The tendency for a substance to catch fire

31
Q

Formulation

A

Mixture of compounds

32
Q

Fractional

distillation

A

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

33
Q

Gas

A

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

34
Q

Graphite

A

Giant covalent compound where each carbon atom makes three bonds

35
Q

Greenhouse gas

A

Gas that traps infra-red radiation

36
Q

Halogen

A

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

37
Q

Hydrocarbon

A

A compound that only has carbon and hydrogen in it

38
Q

Ion

A

Atoms that has lost or gained electrons

39
Q

Ionic bonding

A

Transfer of electrons between a metal and a non-metal

40
Q

Liquid

A

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

41
Q

Mass number

A

The number of protons and neutrons in an atom

42
Q

Melting point

A

Point at which a solid turns into a liquid

43
Q

Metal

A

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

44
Q

Mixture

A

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

45
Q

Mole

A

The molecular mass in grams

46
Q

Neutralization

A

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

47
Q

Neutron

A

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

48
Q

Nobel gas

A

Unreactive gases found on the right of the periodic table

49
Q

Non-metal

A

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

50
Q

Nucleus

A

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

51
Q

Oxidation

A

Loss of electrons

52
Q

Percentage yield

A

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

53
Q

Periodic table

A

A way of sorting out the elements

54
Q

pH

A

How acidic or alkali a solution is

55
Q

Phytomining

A

Mining low yield ores using plants

56
Q

Portable water

A

Water that is safe to drink

57
Q

Proton

A

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

58
Q

Reactivity series

A

List of metals in order of reactivity

59
Q

Reduction

A

Gain of electrons

60
Q

Reversible

reaction

A

A reaction that can go in either direction

61
Q

Solid

A

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

62
Q

Titration

A

Method for determining concentration of solution

63
Q

Transition metal

A

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

64
Q

Viscosity

A

How easily pourable something is

GCSE Science Key Word (3 decks)

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