A-LevelChemistryAtomic structureFeb/Mar 2021Paper 1 Q11 Mark
The table shows the numbers of protons, neutrons and electrons in four different particles, W, X, Y, and Z. number of protons number of neutrons number of electrons W 32 40 32 X 32 40 34 Y 32 42 32 Z 34 40 34 Which pair represents the atoms of two isotopes of the same element?
AW and Y
BW and Z
CX and Y
DX and Z
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The correct answer is A. This question tests the candidate's understanding of atomic structure 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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