AQA CHEMISTRY PAPER 1 EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS|GRADE
A+ GUARANTEED
C1 Atomic Structure - answer
What are atoms? - answerAtoms are the particles that make up everything
What is an element? - answerAn element is a substance in which all the atoms are the same
Where are elements shown? - answerElements are shown in the Periodic table
How many elements are there? - answerThere are around 118 elements
What is a compound? - answerA compound is a substance that contain two or more
elements chemically combined
Describe the properties of compounds - answerThe properties of compounds are usually
different to the elements that they are made from
What is a mixture? - answerA mixture is a substance with different elements or compounds
not chemically combined
Give an example of a mixture - answerAn 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? - answerA molecule is a substance that has any elements chemically
joined
What does a chemical formula tell you about a molecule? - answerA chemical formula tells
the elements in a molecule and the number of atoms of each element
How is a chemical formula presented? - answerEach 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? - answerState 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 - answerFour different ways of
separating mixtures are filtration, crystallisation, distillation or chromatography
Describe the process of filtration - answerPour 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 - answerUse 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 - answerFirst 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 - answerTake 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? - answerEarly ideas of the structure of
atoms stated that they are tiny spheres that cannot be divided
What is the plum pudding model? - answerThe plum pudding model is what scientists
suggested is the structure of atoms is after the discovery of the electron
Describe the plum pudding model - answerThe 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 - answerRutherford took a
piece of gold foil, he then fired tiny positive alpha particles at the gold foil
What did Rutherford observe in the experiment? - answerRutherford 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? - answerRutherford 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
A+ GUARANTEED
C1 Atomic Structure - answer
What are atoms? - answerAtoms are the particles that make up everything
What is an element? - answerAn element is a substance in which all the atoms are the same
Where are elements shown? - answerElements are shown in the Periodic table
How many elements are there? - answerThere are around 118 elements
What is a compound? - answerA compound is a substance that contain two or more
elements chemically combined
Describe the properties of compounds - answerThe properties of compounds are usually
different to the elements that they are made from
What is a mixture? - answerA mixture is a substance with different elements or compounds
not chemically combined
Give an example of a mixture - answerAn 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? - answerA molecule is a substance that has any elements chemically
joined
What does a chemical formula tell you about a molecule? - answerA chemical formula tells
the elements in a molecule and the number of atoms of each element
How is a chemical formula presented? - answerEach 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? - answerState 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 - answerFour different ways of
separating mixtures are filtration, crystallisation, distillation or chromatography
Describe the process of filtration - answerPour 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 - answerUse 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 - answerFirst 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 - answerTake 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? - answerEarly ideas of the structure of
atoms stated that they are tiny spheres that cannot be divided
What is the plum pudding model? - answerThe plum pudding model is what scientists
suggested is the structure of atoms is after the discovery of the electron
Describe the plum pudding model - answerThe 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 - answerRutherford took a
piece of gold foil, he then fired tiny positive alpha particles at the gold foil
What did Rutherford observe in the experiment? - answerRutherford 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? - answerRutherford 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
