AQA Chemistry Paper 1 Exam Questions
With Correct Solutions | Updated
/.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
/.What does the modern periodic table look like? - Answer-Elements are arranged in
order of atomic number, the elements are organised in groups and periods which have
the similar properties
With Correct Solutions | Updated
/.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
/.What does the modern periodic table look like? - Answer-Elements are arranged in
order of atomic number, the elements are organised in groups and periods which have
the similar properties
