AQA GCSE Chemistry - Paper 1
2024/2025 Exam Questions and Answers
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What is the charge of a proton? - 🧠 ANSWER ✔✔+1
What is the charge of a neutron? - 🧠 ANSWER ✔✔0
What is the charge of an electron? - 🧠 ANSWER ✔✔-1
What is the relative mass of a proton? - 🧠 ANSWER ✔✔1
What is the relative mass of a neutron? - 🧠 ANSWER ✔✔1
What is the relative mass of an electron? - 🧠 ANSWER ✔✔Very small
How many types of atoms do elements contain? - 🧠 ANSWER ✔✔Only
one type
What are compounds? - 🧠 ANSWER ✔✔Substances containing two or
more different elements that are chemically bonded together
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,What are mixtures? - 🧠 ANSWER ✔✔Substances containing two or more
different elements that are not chemically bonded together
What pattern is formed from carrying out paper chromatography? - 🧠
ANSWER ✔✔Chromatogram
Which method of separation is useful to separate an insoluble solid from a
liquid? - 🧠 ANSWER ✔✔Filtration
Which method of separation is useful to separate a soluble solid from a
liquid? - 🧠 ANSWER ✔✔Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? -
🧠 ANSWER ✔✔Fractional distillation
Who discovered that the plum pudding model was wrong? - 🧠 ANSWER
✔✔Ernest Rutherford
Who devised an experiment that proved the existence of the neutron? - 🧠
ANSWER ✔✔Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements? - 🧠 ANSWER
✔✔To ensure that elements with similar properties stayed in the same
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,groups. The gaps indicated the existence of undiscovered elements and
allowed Mendeleev to predict what their properties might be
How are the group number and the number of electrons in the outer shell of
an element related? - 🧠 ANSWER ✔✔The group number tells you how
many electrons are in the outer shell of an element. E.g. sodium is in Group
1 therefore it has 1 electron on its outer shell
What kind of ions do metals form? - 🧠 ANSWER ✔✔Positive
Where are the non-metals on the periodic table? - 🧠 ANSWER ✔✔On the
right hand side
Give three properties which are specific to transition metals - 🧠 ANSWER
✔✔1) They can form more than one ion e.g cobalt form Co2+
2) They are often coloured, therefore compounds which contain them are
colourful e.g. potassium chromate is yellow
3) They often make good catalysts e.g. nickel based catalysts are used in
the hydrogenation of alkenes
State three trends as you go down Group 1 - 🧠 ANSWER ✔✔1) Increased
reactivity - the outer electron is more easily lost as the attraction between
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, the nucleus and the electron decreases because the electron is further
away from the nucleus
2) Lower melting and boiling points
3) Higher relative atomic mass
What are the products of the reaction of a Group 1 metal and water - 🧠
ANSWER ✔✔Hydrogen gas and a metal hydroxide
E.g. sodium + water --> sodium hydroxide + hydrogen
What's the difference between the hardness of Group 1 and transition
metals? - 🧠 ANSWER ✔✔Transition metals are harder, denser and
stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition
metals? - 🧠 ANSWER ✔✔Group 1 metals are much more reactive than
transition metals
What's the difference between the melting points of Group 1 and transition
metals? - 🧠 ANSWER ✔✔Transition metals have higher melting points
than Group 1 metals
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2024/2025 Exam Questions and Answers
| 100% Solved
What is the charge of a proton? - 🧠 ANSWER ✔✔+1
What is the charge of a neutron? - 🧠 ANSWER ✔✔0
What is the charge of an electron? - 🧠 ANSWER ✔✔-1
What is the relative mass of a proton? - 🧠 ANSWER ✔✔1
What is the relative mass of a neutron? - 🧠 ANSWER ✔✔1
What is the relative mass of an electron? - 🧠 ANSWER ✔✔Very small
How many types of atoms do elements contain? - 🧠 ANSWER ✔✔Only
one type
What are compounds? - 🧠 ANSWER ✔✔Substances containing two or
more different elements that are chemically bonded together
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
,What are mixtures? - 🧠 ANSWER ✔✔Substances containing two or more
different elements that are not chemically bonded together
What pattern is formed from carrying out paper chromatography? - 🧠
ANSWER ✔✔Chromatogram
Which method of separation is useful to separate an insoluble solid from a
liquid? - 🧠 ANSWER ✔✔Filtration
Which method of separation is useful to separate a soluble solid from a
liquid? - 🧠 ANSWER ✔✔Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? -
🧠 ANSWER ✔✔Fractional distillation
Who discovered that the plum pudding model was wrong? - 🧠 ANSWER
✔✔Ernest Rutherford
Who devised an experiment that proved the existence of the neutron? - 🧠
ANSWER ✔✔Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements? - 🧠 ANSWER
✔✔To ensure that elements with similar properties stayed in the same
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STATEMENT. ALL RIGHTS RESERVED
,groups. The gaps indicated the existence of undiscovered elements and
allowed Mendeleev to predict what their properties might be
How are the group number and the number of electrons in the outer shell of
an element related? - 🧠 ANSWER ✔✔The group number tells you how
many electrons are in the outer shell of an element. E.g. sodium is in Group
1 therefore it has 1 electron on its outer shell
What kind of ions do metals form? - 🧠 ANSWER ✔✔Positive
Where are the non-metals on the periodic table? - 🧠 ANSWER ✔✔On the
right hand side
Give three properties which are specific to transition metals - 🧠 ANSWER
✔✔1) They can form more than one ion e.g cobalt form Co2+
2) They are often coloured, therefore compounds which contain them are
colourful e.g. potassium chromate is yellow
3) They often make good catalysts e.g. nickel based catalysts are used in
the hydrogenation of alkenes
State three trends as you go down Group 1 - 🧠 ANSWER ✔✔1) Increased
reactivity - the outer electron is more easily lost as the attraction between
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STATEMENT. ALL RIGHTS RESERVED
, the nucleus and the electron decreases because the electron is further
away from the nucleus
2) Lower melting and boiling points
3) Higher relative atomic mass
What are the products of the reaction of a Group 1 metal and water - 🧠
ANSWER ✔✔Hydrogen gas and a metal hydroxide
E.g. sodium + water --> sodium hydroxide + hydrogen
What's the difference between the hardness of Group 1 and transition
metals? - 🧠 ANSWER ✔✔Transition metals are harder, denser and
stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition
metals? - 🧠 ANSWER ✔✔Group 1 metals are much more reactive than
transition metals
What's the difference between the melting points of Group 1 and transition
metals? - 🧠 ANSWER ✔✔Transition metals have higher melting points
than Group 1 metals
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