A-Level ChemistryYear 2020Q7
18 7 (a) Give the meaning of the term ‘periodicity’. Illustrate your answer by referring to the atomic radii of the Period 2 and Period 3 elements. Specific values of atomic radii are not required. 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Symbol of the element Li Be B C(diamond) N O F Ne Melting temperature / K 454 1551 2573 3970 63 55 53 25 Explain the trend in melting temperatures across the elements of Period 2 in terms of their structure and bonding. 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(Total for Question 7 = 9 marks)
Paper Source:8CH0_01_que_20201007.pdf
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Exam Specification Info
This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectChemistry
Official MarksVariable (2–6 marks)
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