Pearson Edexcel International GCSE (9–1) Chemistry UNIT: 4CH1 PAPER: 2C QP + MARKSCHEME June 2024

Pearson Edexcel International GCSE (9–1) Tuesday 11 June 2024 Morning (Time: 1 hour 15 minutes) 4CH1/2C Paper reference Total Marks Chemistry UNIT: 4CH1 PAPER: 2C You must have: Calculator, ruler Instructions • Use black ink or ball‑point pen. • Fill in the boxes at the top of this page with your name, centre number and candidate number. • Answer all questions. • Answer the questions in the spaces provided – there may be more space than you need. • Show all the steps in any calculations and state the units. Information • The total mark for this paper is 70. • The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question. Advice • Read each question carefully before you start to answer it. • Write your answers neatly and in good English. • Try to answer every question. • Check your answers if you have time at the end. *P75822A0220* DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA 2    The Periodic Table of the Elements 1 2 3 4 5 6 7 0 Key 1 H hydrogen 1 4 He helium 2 7 Li lithium 3 9 Be beryllium 4 relative atomic mass atomic symbol name atomic (proton) number 11 B boron 5 12 C carbon 6 14 N nitrogen 7 16 O oxygen 8 19 F fluorine 9 20 Ne neon 10 23 Na sodium 11 24 Mg magnesium 12 27 Al aluminium 13 28 Si silicon 14 31 P phosphorus 15 32 S sulfur 16 35.5 Cl chlorine 17 40 Ar argon 18 39 K potassium 19 40 Ca calcium 20 45 Sc scandium 21 48 Ti titanium 22 51 V vanadium 23 52 Cr chromium 24 55 Mn manganese 25 56 Fe iron 26 59 Co cobalt 27 59 Ni nickel 28 63.5 Cu copper 29 65 Zn zinc 30 70 Ga gallium 31 73 Ge germanium 32 75 As arsenic 33 79 Se selenium 34 80 Br bromine 35 84 Kr krypton 36 85 Rb rubidium 37 88 Sr strontium 38 89 Y yttrium 39 91 Zr zirconium 40 93 Nb niobium 41 96 Mo molybdenum 42 [98] Tc technetium 43 101 Ru ruthenium 44 103 Rh rhodium 45 106 Pd palladium 46 108 Ag silver 47 112 Cd cadmium 48 115 In indium 49 119 Sn tin 50 122 Sb antimony 51 128 Te tellurium 52 127 I iodine 53 131 Xe xenon 54 133 Cs caesium 55 137 Ba barium 56 139 La* lanthanum 57 178 Hf hafnium 72 181 Ta tantalum 73 184 W tungsten 74 186 Re rhenium 75 190 Os osmium 76 192 Ir iridium 77 195 Pt platinum 78 197 Au gold 79 201 Hg mercury 80 204 Tl thallium 81 207 Pb lead 82 209 Bi bismuth 83 [209] Po polonium 84 [210] At astatine 85 [222] Rn radon 86 [223] Fr francium 87 [226] Ra radium 88 [227] Ac* actinium 89 [261] Rf rutherfordium 104 [262] Db dubnium 105 [266] Sg seaborgium 106 [264] Bh bohrium 107 [277] Hs hassium 108 [268] Mt meitnerium 109 [271] Ds darmstadtium 110 [272] Rg roentgenium 111 * The lanthanoids (atomic numbers 58–71) and the actinoids (atomic numbers 90–103) have been omitted. The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number. Elements with atomic numbers 112–116 have been reported but not fully authenticated *P75822A0320* Turn over 3  DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA BLANK PAGE *P75822A0420* DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA 4  Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 Use the Periodic Table to answer these questions. (a) (i) Give the name of the element with atomic number 16 (1) .................................................................................................................................................................................................................................................................................... (ii) Give the name of the element with relative atomic mass 9 (1) .................................................................................................................................................................................................................................................................................... (iii) Give the name of the element in Group 3 and Period 2 (1) .................................................................................................................................................................................................................................................................................... (iv) Give the electronic configuration of an atom of silicon. (1) .................................................................................................................................................................................................................................................................................... (b) Explain, in terms of electron configuration, why sodium is more reactive than lithium. 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(Total for Question 1 = 7 marks) *P75822A0520* Turn over 5  DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA 2 Structures made of iron can rust. (a) (i) Name the two substances that cause iron to rust. (2) 1 ............................................................................................................................................................................................................................................................................... 2 ............................................................................................................................................................................................................................................................................... (ii) State a barrier method that prevents rusting. (1) .................................................................................................................................................................................................................................................................................... (b) Explain how sacrificial protection prevents the rusting of iron. (2) ........................................................................................................................................................................