Revision Examination Tests
“Come all for this Greatness”
... 100% Correct Ans ...
AQA CHEMISTRY PAPER 1 EXAM 1 2024-2025
QUESTIONS AND CORRECT DETAILED ANSWERS
Quiz C1 Atomic Structure
Ans:
Quiz What are atoms?
Ans: Atoms are the particles that make up everything
Quiz What is an element?
Ans: An element is a substance in which all the atoms are the same
Quiz Where are elements shown?
Ans: Elements are shown in the Periodic table
Quiz How many elements are there?
Ans: There are around 118 elements
Quiz What is a compound?
Ans: A compound is a substance that contain two or more elements chemically
combined
Quiz Describe the properties of compounds
Ans: The properties of compounds are usually different to the elements that they are
made from
Quiz What is a mixture?
Ans: A mixture is a substance with different elements or compounds not chemically
combined
,Quiz Give an example of a mixture
Ans: An example of a mixture is sand and water as they are not chemically
combined and can be separated by physical means
Quiz What is a molecule?
Ans: A molecule is a substance that has any elements chemically joined
Quiz What does a chemical formula tell you about a molecule?
Ans: A chemical formula tells the elements in a molecule and the number of atoms
of each element
Quiz How is a chemical formula presented?
Ans: Each element symbol starts with a capital letter, if there is a second letter it is
in lower case
Quiz Give an example of a chemical formula
Ans:
Quiz What are state symbols?
Ans: State symbols show the physical state of the substance solid (s), liquid (l), gas
(g), or dissolved in water (aq)
Quiz Name three properties of Metals
Ans: -Strong
-Good conductors of heat and electricity
-High melting and boiling points
Quiz Name three properties of Non-Metals
Ans: -Weak
-Bad conductors of heat and electricity
-Low melting and boiling points
Quiz State the four different ways of separating mixtures
Ans: Four different ways of separating mixtures are filtration, crystallisation,
distillation or chromatography
Quiz Describe the process of filtration
, Ans: 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
Quiz Describe the process of crystallisation
Ans: 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
Quiz Describe the process of simple distillation
Ans: 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
Quiz Describe the process of chromatography
Ans: 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
Quiz What were the early ideas of the structure of atoms?
Ans: Early ideas of the structure of atoms stated that they are tiny spheres that
cannot be divided
Quiz What is the plum pudding model?
Ans: The plum pudding model is what scientists suggested is the structure of atoms
is after the discovery of the electron
Quiz Describe the plum pudding model
Ans: The plum pudding model suggested that an atom is a ball of positive charge
with negative electrons in embedded in it
Quiz Describe how Rutherford carried out the gold foil experiment
Ans: Rutherford took a piece of gold foil, he then fired tiny positive alpha particles at
the gold foil
Quiz What did Rutherford observe in the experiment?
Ans: Rutherford observed that most of the particles when straight through the gold
foil and sometimes the alpha particles bounce back of the gold foil
Quiz What did Rutherford discover from these observations?