A-LevelChemistryAtomic structureMay/June 2016Paper 1 Q21 Mark
Four electronic configurations are shown below. Three of these configurations belong to atoms of the elements chlorine, sodium and vanadium. Which electronic configuration belongs to an atom of another element?
A1s²2s²2p⁶3s¹
B1s²2s²2p⁶3s²3p⁵
C1s²2s²2p⁶3s²3p⁶3d³4s²
D1s²2s²2p⁶3s²3p⁶3d⁶4s²
✓ Correct Answer
The correct answer is D. 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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