A-LevelChemistryChemical periodicityFeb/Mar 2023Paper 1 Q221 Mark
V and Z are both elements in Period 3 of the Periodic Table. Each element forms one stable ion that does not contain another element. The atomic radius of each element and the ionic radius of the ion described above is shown. [Table with columns "element", "atomic radius /nm", "ionic radius /nm" and rows "V 0.186 0.095", "Z 0.099 0.181"] Which statement is correct?
AIons of V and Z have the same number of full electron shells.
BIons of Z are positively charged.
CZ has a greater electronegativity than V.
DV has more outer electrons than Z.
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The correct answer is C. 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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