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AQA Chemistry Paper 1 Test With Complete Solution
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AQA Chemistry Paper 1 Test WithComplete Solution
C1 Atomic Structure - ANSWER
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
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