AQA GCSE COMBINED SCIENCES 8464/C/1H TRILOGY HIGHER TIER CHEMISTRY PAPER 1H EXAM QUESTION PAPER (AUTHENTIC MARKING SCHEME

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0 1 This question is about the periodic table.


. Figure 1 shows part of Mendeleev’s version of the periodic table.


Figure 1




Which group of elements had not been discovered when Mendeleev’s version of the
periodic table was published?
[1 mark]




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Figure 2 represents different models of the atom. box


Figure 2




. Which model represents the plum pudding model?
[1 mark]
Tick () one box.


A B C D




. Which model resulted from Chadwick’s experimental work?
[1 mark]
Tick () one box.


A B C D




Question 1 continues on the next page




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Potassium has different isotopes. box




. What is meant by ‘isotopes’?

You should refer to subatomic particles.
[2 marks]




. Table 1 shows the mass numbers and the percentage abundance of two
isotopes of potassium.

Table 1

Mass number Percentage abundance

39 93.1

41 6.9



Calculate the relative atomic mass (Ar) of potassium.

Give your answer to 1 decimal place.
[3 marks]




Relative atomic mass (1 decimal place) = 8




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