Edexcel Jun 2017 Paper 1 Q6

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4 An atom and an ion with a single positive charge are isoelectronic. Therefore the A atom and the ion have the same mass number. B atom and the ion have the same atomic number. C atomic number of the atom is one more than that of the ion. D atomic number of the atom is one less than that of the ion. 5 The electronic configuration of a species which has only one unpaired electron is (Total for Question 4 = 1 mark) A 1s 2 2s2 2p2 B 1s 2 2s2 2p3 C 1s 2 2s2 2p4 D 1s 2 2s2 2p5 (Total for Question 5 = 1 mark) 6 The CFC dichlorodifluoromethane has the molecular formula CCl2F2 and its molar mass is 121 g mol1. What is the total number of atoms in 2.42 g of dichlorodifluoromethane? [Avogadro constant = 6.01023 mol1] A 6.010 B 4.810 C 3.610 D 1.210 22 22 22 22 Use this space for rough working. Anything you write in this space will gain no credit. (Total for Question 6 = 1 mark) *P53491A0432* D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A<br />

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