M4 The Periodic Table: Halogens
Slide
40
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Practice Question
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(ii) State a use of chlorine.
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(f) Astatine, At, is below iodine in Group VII of the Periodic Table.
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(i) In which Period of the Periodic Table is astatine?
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(ii) How many protons does astatine have in its nucleus?
[1]