AQA GCSE Chemistry Paper 1 (8462/2F)
Foundation Mark Scheme | June 2025 Edition |
Latest 2025/2026 Revision Guide to Pass First
Time
What is an atom? - answer-Smallest part of an element that can exist
What is an element? - answer-A substance made up of one type of atom
How are elements represented? - answer-Using symbols, in the periodic table
Approximately how many elements are there? - answer-100
What is the chemical formula of water? - answer-H2O
What is the chemical formula of methane? - answer-CH4
What is the chemical formula of ammonia? - answer-NH3
,How do you know from the formula of a substance that it is covalently
bonded? - answer-The elements in the molecule are all non-metal elements
Give an example of a covalently bonded substance that has very large
molecules - answer-Polymers
Give two examples of covalently bonded substances that has giant covalent
structures - answer-Diamond and silicon dioxide
What are the limitations of using a dot and cross diagram to represent
molecules or giant structures? - answer-A dot and cross diagram does not
show the relative sizes of the atoms, or how they are arranged in space
What are the limitations of using a three-dimensional ball and stick model to
represent molecules or giant structures? - answer-A three-dimensional ball and
stick model does not show the true shape of the molecule
What is the structure of a metal? - answer-A metal is a giant structure of atoms
arranged in a regular pattern
What happens to electrons in a giant metal structure? - answer-The outer
electrons are delocalised and so are free to move through the whole structure
Why are metallic bonds strong? - answer-The sharing of delocalised electrons
give rise to strong bonds
What are the three states of matter? - answer-Solid, liquid, gas
,Describe the arrangement and movement of particles in a solid - answer-
Particles are very close, arranged in a regular pattern, vibrate in a fixed
position, have low energy
Describe the arrangement and movement of particles in a liquid - answer-
Particles are close, randomly arranged, move around each other and have
greater energy than solid particles
Describe the arrangement and movement of particles in a gas - answer-
Particles are far apart, randomly arranged, move quickly in all directions and
have the highest energy
Describe the properties of a solid - answer-Solids have a fixed shape, cannot
flow and cannot be compressed
Describe the properties of a liquid - answer-Liquids can flow, take the shape of
their container and cannot be compressed
Describe the properties of a solid - answer-Gases flow and completely fill their
container, and can be compressed
What happens at the melting point of a substance? - answer-Melting and
freezing takes place
What happens at the boiling point of a substance? - answer-Boiling and
condensing takes place
, What is a compound? - answer-A substance made up of two or more elements
chemically combined in fixed proportions
How are the elements in a compound separated? - answer-By chemical
reaction
How are chemical reactions represented? - answer-By word or symbol
equations
Which group of the periodic table includes sodium and potassium? - answer-
Group 1, alkali metals
Which group of the periodic table includes chlorine, bromine and iodine? -
answer-Group 7, halogens
Which group of the periodic table includes helium, neon and argon? - answer-
Group 0, noble gases
What information does a chemical formula provide? - answer-Which elements
are bonded together, and how many atoms of each are present
Foundation Mark Scheme | June 2025 Edition |
Latest 2025/2026 Revision Guide to Pass First
Time
What is an atom? - answer-Smallest part of an element that can exist
What is an element? - answer-A substance made up of one type of atom
How are elements represented? - answer-Using symbols, in the periodic table
Approximately how many elements are there? - answer-100
What is the chemical formula of water? - answer-H2O
What is the chemical formula of methane? - answer-CH4
What is the chemical formula of ammonia? - answer-NH3
,How do you know from the formula of a substance that it is covalently
bonded? - answer-The elements in the molecule are all non-metal elements
Give an example of a covalently bonded substance that has very large
molecules - answer-Polymers
Give two examples of covalently bonded substances that has giant covalent
structures - answer-Diamond and silicon dioxide
What are the limitations of using a dot and cross diagram to represent
molecules or giant structures? - answer-A dot and cross diagram does not
show the relative sizes of the atoms, or how they are arranged in space
What are the limitations of using a three-dimensional ball and stick model to
represent molecules or giant structures? - answer-A three-dimensional ball and
stick model does not show the true shape of the molecule
What is the structure of a metal? - answer-A metal is a giant structure of atoms
arranged in a regular pattern
What happens to electrons in a giant metal structure? - answer-The outer
electrons are delocalised and so are free to move through the whole structure
Why are metallic bonds strong? - answer-The sharing of delocalised electrons
give rise to strong bonds
What are the three states of matter? - answer-Solid, liquid, gas
,Describe the arrangement and movement of particles in a solid - answer-
Particles are very close, arranged in a regular pattern, vibrate in a fixed
position, have low energy
Describe the arrangement and movement of particles in a liquid - answer-
Particles are close, randomly arranged, move around each other and have
greater energy than solid particles
Describe the arrangement and movement of particles in a gas - answer-
Particles are far apart, randomly arranged, move quickly in all directions and
have the highest energy
Describe the properties of a solid - answer-Solids have a fixed shape, cannot
flow and cannot be compressed
Describe the properties of a liquid - answer-Liquids can flow, take the shape of
their container and cannot be compressed
Describe the properties of a solid - answer-Gases flow and completely fill their
container, and can be compressed
What happens at the melting point of a substance? - answer-Melting and
freezing takes place
What happens at the boiling point of a substance? - answer-Boiling and
condensing takes place
, What is a compound? - answer-A substance made up of two or more elements
chemically combined in fixed proportions
How are the elements in a compound separated? - answer-By chemical
reaction
How are chemical reactions represented? - answer-By word or symbol
equations
Which group of the periodic table includes sodium and potassium? - answer-
Group 1, alkali metals
Which group of the periodic table includes chlorine, bromine and iodine? -
answer-Group 7, halogens
Which group of the periodic table includes helium, neon and argon? - answer-
Group 0, noble gases
What information does a chemical formula provide? - answer-Which elements
are bonded together, and how many atoms of each are present
