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Explain why chlorine molecules are described as diatomic molecules.
See it on the paper →the most reactive halogen. Question 6 starts on the next page.
See it on the paper →Complete Table 5.1.
See it on the paper →State the name given to Group VII of the Periodic Table.
See it on the paper →Explain why chlorine, bromine and iodine are all in Group VII of the Periodic Table. Use ideas about electrons in your answer.
See it on the paper →Complete Table 5.1 to predict the melting point of fluorine. Use ideas about trends down a group to help you.
See it on the paper →Table 5.1 shows some information about three Group VII elements. Complete Table 5.1. Table 5.1 element formula of molecules bromine colour metal or non-metal? orange non-metal chlorine iodine grey-black I 2
See it on the paper →State the name given to the Group VII elements in the Periodic Table.
See it on the paper →Comprehensive responses • There were few correct responses. These responses explained that a chlorine molecule contains two chlorine atoms. Limited responses • Most incorrect responses referred to the number of elements contained in a chlorine molecule.
— Examiner report, February/March 2026, 0654/32 Q7(a)(i) (Cambridge)
Most candidates were awarded at least one mark. This was usually for the metal/non-metal column. The colour of chlorine gas was not known.
— Examiner report, October/November 2023, 0654/33 Q5(a) (Cambridge)
Few candidates knew that the Group VII elements are known as the halogens.
— Examiner report, October/November 2023, 0654/33 Q5(b) (Cambridge)
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is a halogen
See it on the paper →is used to sterilise drinking water
See it on the paper →Halogen molecules are diatomic. State the formula of a molecule of bromine.
See it on the paper →State the group number of the halogens in the Periodic Table.
See it on the paper →State the formula of iodine.
See it on the paper →Explain why a chlorine molecule is described as diatomic.
See it on the paper →State the name given to the elements in Group VII of the Periodic Table.
See it on the paper →Explain why the drinking water supply for a large town is treated with chlorine.
See it on the paper →Describe the chemical test for chlorine and give the positive result. test result
See it on the paper →Select one element from Fig. 5.1 that is used to treat water to make it safe to drink. Explain how it does this. element explanation
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