AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
AQA GCSE CHEMISTRY PAPER 1 EXAM
2024/2025 VERIFIED QUESTIONS AND ANSWERS
GRADED A+ OXFORD
How many types of atoms do elements contain?
Only one type
What are compounds?
Substances containing two or more different elements that are chemically bonded
together
What are mixtures?
Substances containing two or more different elements that are not chemically
bonded together
What pattern is formed from carrying out paper chromatography?
Chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid?
,AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
Filtration
Which method of separation is useful to separate a soluble solid from a liquid?
Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points?
Fractional distillation
Who discovered that the plum pudding model was wrong?
Ernest Rutherford
Who devised an experiment that proved the existence of the neutron?
Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements?
,AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
To ensure that elements with similar properties stayed in the same 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?
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?
Positive
Where are the non-metals on the periodic table?
On the right hand side
Give three properties which are specific to transition metals
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
, AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
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
1) Increased reactivity - the outer electron is more easily lost as the attraction
between 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
Hydrogen gas and a metal hydroxide
E.g. sodium + water --> sodium hydroxide + hydrogen
AD
What's the difference between the hardness of Group 1 and transition metals?
Transition metals are harder, denser and stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition metals?
AQA GCSE CHEMISTRY PAPER 1 EXAM
2024/2025 VERIFIED QUESTIONS AND ANSWERS
GRADED A+ OXFORD
How many types of atoms do elements contain?
Only one type
What are compounds?
Substances containing two or more different elements that are chemically bonded
together
What are mixtures?
Substances containing two or more different elements that are not chemically
bonded together
What pattern is formed from carrying out paper chromatography?
Chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid?
,AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
Filtration
Which method of separation is useful to separate a soluble solid from a liquid?
Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points?
Fractional distillation
Who discovered that the plum pudding model was wrong?
Ernest Rutherford
Who devised an experiment that proved the existence of the neutron?
Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements?
,AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
To ensure that elements with similar properties stayed in the same 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?
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?
Positive
Where are the non-metals on the periodic table?
On the right hand side
Give three properties which are specific to transition metals
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
, AQA GCSE CHEMISTRY PAPER 1 EXAM 2024/2025
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
1) Increased reactivity - the outer electron is more easily lost as the attraction
between 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
Hydrogen gas and a metal hydroxide
E.g. sodium + water --> sodium hydroxide + hydrogen
AD
What's the difference between the hardness of Group 1 and transition metals?
Transition metals are harder, denser and stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition metals?
