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Examinor’s Report

OCR GCSE Chemistry 2015 JUNE

B742/02 C4, C5, C6 Higher Tier MODEL ANSWERS

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​SECTION A – Module C4

Question 1

1. Look at the electronic structures of some atoms.

(a) (i) One of the atoms is a metal which makes a positive ion.
Which one? Choose from the table.

Answer: Atom W [1]

Explanation: Electronic structure shows the number of electrons in each shell. Atom W will lose the 1 electron to get a complete outer shell, making a positive ion.