GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 1H

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This question is about the periodic table. box 0 1 . 1 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]3 *03* Turn over ► IB/M/Jun21/8464/C/1H Do not write outside the Figure 2 represents different models of the atom. box Figure 2 0 1 . 2 Which model represents the plum pudding model? [1 mark] Tick () one box. A B C D 0 1 . 3 Which model resulted from Chadwick’s experimental work? [1 mark] Tick () one box. A B C D Question 1 continues on the next page4 *04* IB/M/Jun21/8464/C/1H Do not write outside the box 8 Potassium has different isotopes. 0 1 . 4 What is meant by ‘isotopes’? You should refer to subatomic particles. [2 marks] 0 1 . 5 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) =5 *05* Turn over ► IB/M/Jun21/8464/C/1H Do not write outside the Turn over for the next question box DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED6 *06* IB/M/Jun21/8464/C/1H Do not write outside the 0 2 Acids react to produce salts. box Universal indicator is added to water and then nitric acid is added to the mixture. 0 2 . 1 Give the colour change when nitric acid is added to the mixture of universal indicator and water. [1 mark] Tick () one box. Blue to red Green to purple Green to red Red to purple 0 2 . 2 What happens to the pH of water when nitric acid is added? [1 mark] Tick () one box. Decreases Stays the same Increases 0 2 . 3 What is the state symbol for nitric acid? [Show More]

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