Science B, Combined (9-1) - Twenty First Century Science Suite J260 9-1: C2: Chemical patterns Topical Past Paper Questions
OCR GCSE (9-1) Science B, Combined (9-1) - Twenty First Century Science Suite J260 (9-1) past-paper questions on C2: Chemical patterns, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Doctors select radioactive isotopes for imaging scans and for treatments very carefully. The table shows the radiation emitted and half-lives of 6 radioactive samples. (a) Which sample is suitable to be used as a radioactive tracer for an imaging scan? Explain your answer. Use da…
Compounds are bonded together ionically or covalently. Models are used to represent these compounds. (a) Sodium (electron arrangement 2.8.1) reacts with chlorine (electron arrangement 2.8.7) to form sodium chloride. Sodium chloride is bonded ionically. Two models are shown to rep…
Group 1 elements react with Group 7 elements. (a) Complete the sentences to explain how the reaction between potassium and bromine is related to their electron arrangements. Use the words and numbers. You can use each word and each number once, more than once, or not at all. -1 -…
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