CHEMESTRY
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CHEMESTRY 6
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GCE CHEMESTRY MARKING SCHEME
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Question Answer Marks AO element Guidance 1 (a) (i) 1s22s22p63s2 1 AO1.1 ALLOW upper case S and P, and subscripts, e.g. …...2S23P6 (ii) (Mg) loses/transfers/donates two electrons 1 AO1.1 ALLOW Mg loses the 3s electrons provided electronic configuration in (a)(i) is 3S 2 ALLOW Mg Mg2+ + 2e– IGNORE reference to oxidation numbers / states (b) (i) Sr+ (g) Sr2+(g) + e– 1 AO2.5 ALLOW Sr+ (g) – e – Sr2+(g) ALLOW e for electron (i.e. charge omitted...
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