AQA GCSE CHEMISTRY PAPER 1 EXAM
2026/2027 VERIFIED QUESTIONS AND
ANSWERS GRADED A+ OXFORD.
How many types of atoms do elements contain? >>CORRECT ANS>>Only one type
What are compounds?
>>CORRECT ANS>>Substances containing two or more different elements that are
chemically bonded together
What are mixtures?
>>CORRECT ANS>>Substances containing two or more different elements that are not
chemically bonded together
What pattern is formed from carrying out paper chromatography? >>CORRECT
ANS>>Chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid?
>>CORRECT ANS>>Filtration
Which method of separation is useful to separate a soluble solid from a liquid? >>CORRECT
ANS>>Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? >>CORRECT
ANS>>Fractional distillation
Who discovered that the plum pudding model was wrong? >>CORRECT ANS>>Ernest
Rutherford
,Who devised an experiment that proved the existence of the neutron? >>CORRECT
ANS>>Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements?
>>CORRECT ANS>>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?
>>CORRECT ANS>>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? >>CORRECT ANS>>Positive
Where are the non-metals on the periodic table? >>CORRECT ANS>>On the right-hand side
Give three properties which are specific to transition metals
They can form more than one ion e.g cobalt form Co2+
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
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
Lower melting and boiling points
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?
Group 1 metals are much more reactive than transition metals
What's the difference between the melting points of Group 1 and transition metals?
Transition metals have higher melting points than Group 1 metals
What trends occur as you go down Group 7?
They become less reactive - it's harder to gain an extra electron because the outer shell's
further from the nucleus
They have higher melting and boiling points
They have higher relative atomic masses
What is the charge of the ions that halogens form when they react with metals? They form
negative ions
What is the charge of a proton?
+1
What is the charge of a neutron? 0
What is the charge of an electron?
-1
What is the relative mass of a proton? 1
What is the relative mass of a neutron? 1
2026/2027 VERIFIED QUESTIONS AND
ANSWERS GRADED A+ OXFORD.
How many types of atoms do elements contain? >>CORRECT ANS>>Only one type
What are compounds?
>>CORRECT ANS>>Substances containing two or more different elements that are
chemically bonded together
What are mixtures?
>>CORRECT ANS>>Substances containing two or more different elements that are not
chemically bonded together
What pattern is formed from carrying out paper chromatography? >>CORRECT
ANS>>Chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid?
>>CORRECT ANS>>Filtration
Which method of separation is useful to separate a soluble solid from a liquid? >>CORRECT
ANS>>Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? >>CORRECT
ANS>>Fractional distillation
Who discovered that the plum pudding model was wrong? >>CORRECT ANS>>Ernest
Rutherford
,Who devised an experiment that proved the existence of the neutron? >>CORRECT
ANS>>Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements?
>>CORRECT ANS>>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?
>>CORRECT ANS>>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? >>CORRECT ANS>>Positive
Where are the non-metals on the periodic table? >>CORRECT ANS>>On the right-hand side
Give three properties which are specific to transition metals
They can form more than one ion e.g cobalt form Co2+
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
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
Lower melting and boiling points
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?
Group 1 metals are much more reactive than transition metals
What's the difference between the melting points of Group 1 and transition metals?
Transition metals have higher melting points than Group 1 metals
What trends occur as you go down Group 7?
They become less reactive - it's harder to gain an extra electron because the outer shell's
further from the nucleus
They have higher melting and boiling points
They have higher relative atomic masses
What is the charge of the ions that halogens form when they react with metals? They form
negative ions
What is the charge of a proton?
+1
What is the charge of a neutron? 0
What is the charge of an electron?
-1
What is the relative mass of a proton? 1
What is the relative mass of a neutron? 1
