A-LevelChemistryChemical periodicityMay/June 2016Paper 1 Q351 Mark
The first ionisation energies of twenty successive elements in the Periodic Table are represented in the graph. The letters given are not the normal symbols for these elements. [Figure of first ionisation energy graph] Which statements about this graph are correct? 1 Elements B, J and R are in Group 18 of the Periodic Table. 2 Atoms of elements D and L contain two electrons in their outer shells. 3 Atoms of elements G and O contain a half-filled p subshell.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
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The correct answer is A. This question tests the candidate's understanding of chemical periodicity within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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