AQA GCSE CHEMISTRY PAPER 1 CHEMISTRY COURSE
2025/2026 | VERIFIED QUESTIONS AND ANSWERS
GRADED A+ | FOUNDATIONAL CONCEPTS & EXAM PREP
STUDY GUIDE | GUARANTEED SUCCESS
What is the product of the reaction of a Group 1 metal with oxygen? -
CORRECT ANSWER - -A metal oxide, depending on the Group 1 metal
-Lithium + oxygen --> lithium oxide
-Sodium + oxygen --> sodium oxide + sodium peroxide
-Potassium + oxygen --> potassium peroxide + potassium superoxide
What are halogens? - CORRECT ANSWER - -Non-metals in Group 7 with
coloured vapours
What colour is fluorine? - CORRECT ANSWER - -A very reactive, poisonous
yellow gas
What colour is chlorine? - CORRECT ANSWER - -A fairly reactive,
poisonous dense green gas
What colour is bromine? - CORRECT ANSWER - -A dense, poisonous red-
brown volatile liquid
What colour is iodine? - CORRECT ANSWER - -A dark grey crystalline solid
or a purple vapour
What do halogens exist as? - CORRECT ANSWER - -Molecules - pairs of
atoms
What do halogens form? - CORRECT ANSWER - -1) Molecular compounds -
halogens share electrons via covalent bonding with other non-metals too
achieves a full outer shell
,2) Ionic compounds with metals - they form 1- ions called halides
What do noble gases exist as? - CORRECT ANSWER - -Monatomic gases -
single atoms not bonded to each other
What are the noble gases at room temperature? - CORRECT ANSWER - -
Colourless gases
Are the noble gases flammable? - CORRECT ANSWER - -No - they're non-
flammable
What is the charge of a proton? - CORRECT ANSWER - -+1
What is the charge of a neutron? - CORRECT ANSWER - -0
What is the charge of an electron? - CORRECT ANSWER - --1
What is the relative mass of a proton? - CORRECT ANSWER - -1
What is the relative mass of a neutron? - CORRECT ANSWER - -1
What is the relative mass of an electron? - CORRECT ANSWER - -Very
small
How many types of atoms do elements contain? - CORRECT ANSWER - -
Only one type
What are compounds? - CORRECT ANSWER - -Substances containing two
or more different elements that are chemically bonded together
,What are mixtures? - CORRECT ANSWER - -Substances containing two or
more different elements that are not chemically bonded together
What pattern is formed from carrying out paper chromatography? - CORRECT
ANSWER - -Chromatogram
Which method of separation is useful to separate an insoluble solid from a
liquid? - CORRECT ANSWER - -Filtration
Which method of separation is useful to separate a soluble solid from a liquid? -
CORRECT ANSWER - -Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? -
CORRECT ANSWER - -Fractional distillation
Who discovered that the plum pudding model was wrong? - CORRECT
ANSWER - -Ernest Rutherford
Who devised an experiment that proved the existence of the neutron? -
CORRECT ANSWER - -Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements? - CORRECT
ANSWER - -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 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? - CORRECT ANSWER - -Positive
Where are the non-metals on the periodic table? - CORRECT ANSWER - -On
the right hand side
Give three properties which are specific to transition metals - CORRECT
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 - CORRECT ANSWER - -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 -
CORRECT 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? -
CORRECT 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? -
CORRECT ANSWER - -Group 1 metals are much more reactive than
transition metals
2025/2026 | VERIFIED QUESTIONS AND ANSWERS
GRADED A+ | FOUNDATIONAL CONCEPTS & EXAM PREP
STUDY GUIDE | GUARANTEED SUCCESS
What is the product of the reaction of a Group 1 metal with oxygen? -
CORRECT ANSWER - -A metal oxide, depending on the Group 1 metal
-Lithium + oxygen --> lithium oxide
-Sodium + oxygen --> sodium oxide + sodium peroxide
-Potassium + oxygen --> potassium peroxide + potassium superoxide
What are halogens? - CORRECT ANSWER - -Non-metals in Group 7 with
coloured vapours
What colour is fluorine? - CORRECT ANSWER - -A very reactive, poisonous
yellow gas
What colour is chlorine? - CORRECT ANSWER - -A fairly reactive,
poisonous dense green gas
What colour is bromine? - CORRECT ANSWER - -A dense, poisonous red-
brown volatile liquid
What colour is iodine? - CORRECT ANSWER - -A dark grey crystalline solid
or a purple vapour
What do halogens exist as? - CORRECT ANSWER - -Molecules - pairs of
atoms
What do halogens form? - CORRECT ANSWER - -1) Molecular compounds -
halogens share electrons via covalent bonding with other non-metals too
achieves a full outer shell
,2) Ionic compounds with metals - they form 1- ions called halides
What do noble gases exist as? - CORRECT ANSWER - -Monatomic gases -
single atoms not bonded to each other
What are the noble gases at room temperature? - CORRECT ANSWER - -
Colourless gases
Are the noble gases flammable? - CORRECT ANSWER - -No - they're non-
flammable
What is the charge of a proton? - CORRECT ANSWER - -+1
What is the charge of a neutron? - CORRECT ANSWER - -0
What is the charge of an electron? - CORRECT ANSWER - --1
What is the relative mass of a proton? - CORRECT ANSWER - -1
What is the relative mass of a neutron? - CORRECT ANSWER - -1
What is the relative mass of an electron? - CORRECT ANSWER - -Very
small
How many types of atoms do elements contain? - CORRECT ANSWER - -
Only one type
What are compounds? - CORRECT ANSWER - -Substances containing two
or more different elements that are chemically bonded together
,What are mixtures? - CORRECT ANSWER - -Substances containing two or
more different elements that are not chemically bonded together
What pattern is formed from carrying out paper chromatography? - CORRECT
ANSWER - -Chromatogram
Which method of separation is useful to separate an insoluble solid from a
liquid? - CORRECT ANSWER - -Filtration
Which method of separation is useful to separate a soluble solid from a liquid? -
CORRECT ANSWER - -Evaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? -
CORRECT ANSWER - -Fractional distillation
Who discovered that the plum pudding model was wrong? - CORRECT
ANSWER - -Ernest Rutherford
Who devised an experiment that proved the existence of the neutron? -
CORRECT ANSWER - -Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements? - CORRECT
ANSWER - -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 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? - CORRECT ANSWER - -Positive
Where are the non-metals on the periodic table? - CORRECT ANSWER - -On
the right hand side
Give three properties which are specific to transition metals - CORRECT
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 - CORRECT ANSWER - -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 -
CORRECT 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? -
CORRECT 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? -
CORRECT ANSWER - -Group 1 metals are much more reactive than
transition metals
