AQA Chemistry Paper 1 With Detailed
Questions And Correct
Answers||Latest Exam
2026/2027||Already Graded A+
CHAPTER 1 ATOMIC STRUCTURE
What are atoms? -ANSWER Atoms are the particles that make up everything
What is an element? -ANSWER An element is a substance in which all the atoms are
the same
Where are elements shown? -ANSWER Elements are shown in the Periodic table
How many elements are there? -ANSWER There are around 118 elements
What is a compound? -ANSWER A compound is a substance that contain two or more
elements chemically combined
Describe the properties of compounds -ANSWER The properties of compounds are
usually different to the elements that they are made from
What is a mixture? -ANSWER A mixture is a substance with different elements or
compounds not chemically combined
Give an example of a mixture -ANSWER An example of a mixture is sand and water as
they are not chemically combined and can be separated by physical means
What is a molecule? -ANSWER A molecule is a substance that has any elements
chemically joined
What does a chemical formula tell you about a molecule? -ANSWER A chemical formula
tells the elements in a molecule and the number of atoms of each element
How is a chemical formula presented? -ANSWER Each element symbol starts with a
capital letter, if there is a second letter it is in lower case
Give an example of a chemical formula -ANSWER
What are state symbols? -ANSWER State symbols show the physical state of the
substance solid (s), liquid (l), gas (g), or dissolved in water (aq)
,Name three properties of Metals -ANSWER -Strong
-Good conductors of heat and electricity
-High melting and boiling points
Name three properties of Non-Metals -ANSWER -Weak
-Bad conductors of heat and electricity
-Low melting and boiling points
State the four different ways of separating mixtures -ANSWER Four different ways of
separating mixtures are filtration, crystallisation, distillation or chromatography
Describe the process of filtration -ANSWER Pour your mixture onto the filter paper, the
liquid simply passes through the filter paper into the flask. The insoluble solid cannot
pass through and so it stays on the paper
Describe the process of crystallisation -ANSWER Use the method of filtration to filter off
any excess soluble solid. Evaporate the mixture then transfer the hot mixture onto a
dish. Crystals are formed when the mixture has cooled
Describe the process of simple distillation -ANSWER First we evaporate the mixture by
heating it, the dissolved solid then vaporises. These vapours condense in the
condenser, the dissolved solid then flows into the beaker and liquid stays in the flask
Describe the process of chromatography -ANSWER Take a strip of filter paper and draw
a line on the bottom of the paper. Put a small drop of ink on the line, take a jar full of
water up to the line and put the filter paper in. As the water moves up we see different
colours on the paper these are the dyes in the ink
What were the early ideas of the structure of atoms? -ANSWER Early ideas of the
structure of atoms stated that they are tiny spheres that cannot be divided
What is the plum pudding model? -ANSWER The plum pudding model is what scientists
suggested is the structure of atoms is after the discovery of the electron
Describe the plum pudding model -ANSWER The plum pudding model suggested that
an atom is a ball of positive charge with negative electrons in embedded in it
Describe how Rutherford carried out the gold foil experiment -ANSWER Rutherford took
a piece of gold foil, he then fired tiny positive alpha particles at the gold foil
What did Rutherford observe in the experiment? -ANSWER Rutherford observed that
most of the particles when straight through the gold foil and sometimes the alpha
particles bounce back of the gold foil
, What did Rutherford discover from these observations? -ANSWER Rutherford
discovered that atoms are mainly empty space as most of the alpha particles went
straight through the gold atoms and that the nucleus of the atom is very small as only a
small number of alpha particles bounce back
Describe the structure of the nuclear model -ANSWER The nuclear model states that
most of an atom is empty space, in the centre is the nucleus which contains protons and
neutrons around the edge we find electrons
What is the Relative mass and the relative charge of protons, neutrons and electrons? -
ANSWER
Why do atoms have the same number of protons as electrons? -ANSWER Because
atoms have have no overall charge
What is an Ion? -ANSWER An ion is a charged particle, it is possible to get positive or
negative ions
What is an Isotope? -ANSWER Atoms of the same element with different numbers of
neutrons are called isotopes
What is the mass number of an element? -ANSWER The mass number is the number on
the top of an element it is the number of proton and neutrons combined
What is the atomic number of an element? -ANSWER The atomic number is the number
on the bottom it is number of protons in an atom, which is the same as the number of
electrons
How many electrons can you fit in the first, second and third shells? -ANSWER Shell 1 :
2 electrons
Shell 2 : 8 electrons
Shell 3 : 8 electrons
What is an Electronic structure? -ANSWER A set of number to show the arrangement of
electrons in their shells, eg. [2,6]
C2 The periodic table -ANSWER
What did John Newlands periodic table look like? -ANSWER He arranged the elements
in order of increasing atomic mass, he saw that every eighth element reacted in a
similar way
What did Dmitri Mendeleev's periodic table look like? -ANSWER He arranged the
elements in order of increasing atomic mass, he switched the order of some elements to
the fitted in the patterns of other elements. He left gaps for undiscovered elements
Questions And Correct
Answers||Latest Exam
2026/2027||Already Graded A+
CHAPTER 1 ATOMIC STRUCTURE
What are atoms? -ANSWER Atoms are the particles that make up everything
What is an element? -ANSWER An element is a substance in which all the atoms are
the same
Where are elements shown? -ANSWER Elements are shown in the Periodic table
How many elements are there? -ANSWER There are around 118 elements
What is a compound? -ANSWER A compound is a substance that contain two or more
elements chemically combined
Describe the properties of compounds -ANSWER The properties of compounds are
usually different to the elements that they are made from
What is a mixture? -ANSWER A mixture is a substance with different elements or
compounds not chemically combined
Give an example of a mixture -ANSWER An example of a mixture is sand and water as
they are not chemically combined and can be separated by physical means
What is a molecule? -ANSWER A molecule is a substance that has any elements
chemically joined
What does a chemical formula tell you about a molecule? -ANSWER A chemical formula
tells the elements in a molecule and the number of atoms of each element
How is a chemical formula presented? -ANSWER Each element symbol starts with a
capital letter, if there is a second letter it is in lower case
Give an example of a chemical formula -ANSWER
What are state symbols? -ANSWER State symbols show the physical state of the
substance solid (s), liquid (l), gas (g), or dissolved in water (aq)
,Name three properties of Metals -ANSWER -Strong
-Good conductors of heat and electricity
-High melting and boiling points
Name three properties of Non-Metals -ANSWER -Weak
-Bad conductors of heat and electricity
-Low melting and boiling points
State the four different ways of separating mixtures -ANSWER Four different ways of
separating mixtures are filtration, crystallisation, distillation or chromatography
Describe the process of filtration -ANSWER Pour your mixture onto the filter paper, the
liquid simply passes through the filter paper into the flask. The insoluble solid cannot
pass through and so it stays on the paper
Describe the process of crystallisation -ANSWER Use the method of filtration to filter off
any excess soluble solid. Evaporate the mixture then transfer the hot mixture onto a
dish. Crystals are formed when the mixture has cooled
Describe the process of simple distillation -ANSWER First we evaporate the mixture by
heating it, the dissolved solid then vaporises. These vapours condense in the
condenser, the dissolved solid then flows into the beaker and liquid stays in the flask
Describe the process of chromatography -ANSWER Take a strip of filter paper and draw
a line on the bottom of the paper. Put a small drop of ink on the line, take a jar full of
water up to the line and put the filter paper in. As the water moves up we see different
colours on the paper these are the dyes in the ink
What were the early ideas of the structure of atoms? -ANSWER Early ideas of the
structure of atoms stated that they are tiny spheres that cannot be divided
What is the plum pudding model? -ANSWER The plum pudding model is what scientists
suggested is the structure of atoms is after the discovery of the electron
Describe the plum pudding model -ANSWER The plum pudding model suggested that
an atom is a ball of positive charge with negative electrons in embedded in it
Describe how Rutherford carried out the gold foil experiment -ANSWER Rutherford took
a piece of gold foil, he then fired tiny positive alpha particles at the gold foil
What did Rutherford observe in the experiment? -ANSWER Rutherford observed that
most of the particles when straight through the gold foil and sometimes the alpha
particles bounce back of the gold foil
, What did Rutherford discover from these observations? -ANSWER Rutherford
discovered that atoms are mainly empty space as most of the alpha particles went
straight through the gold atoms and that the nucleus of the atom is very small as only a
small number of alpha particles bounce back
Describe the structure of the nuclear model -ANSWER The nuclear model states that
most of an atom is empty space, in the centre is the nucleus which contains protons and
neutrons around the edge we find electrons
What is the Relative mass and the relative charge of protons, neutrons and electrons? -
ANSWER
Why do atoms have the same number of protons as electrons? -ANSWER Because
atoms have have no overall charge
What is an Ion? -ANSWER An ion is a charged particle, it is possible to get positive or
negative ions
What is an Isotope? -ANSWER Atoms of the same element with different numbers of
neutrons are called isotopes
What is the mass number of an element? -ANSWER The mass number is the number on
the top of an element it is the number of proton and neutrons combined
What is the atomic number of an element? -ANSWER The atomic number is the number
on the bottom it is number of protons in an atom, which is the same as the number of
electrons
How many electrons can you fit in the first, second and third shells? -ANSWER Shell 1 :
2 electrons
Shell 2 : 8 electrons
Shell 3 : 8 electrons
What is an Electronic structure? -ANSWER A set of number to show the arrangement of
electrons in their shells, eg. [2,6]
C2 The periodic table -ANSWER
What did John Newlands periodic table look like? -ANSWER He arranged the elements
in order of increasing atomic mass, he saw that every eighth element reacted in a
similar way
What did Dmitri Mendeleev's periodic table look like? -ANSWER He arranged the
elements in order of increasing atomic mass, he switched the order of some elements to
the fitted in the patterns of other elements. He left gaps for undiscovered elements
