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8.3. Group VII properties
A subsection of Chemistry, 0620, through 8. The Periodic Table
Listing 10 of 123 questions
The table shows some properties of four halogens in GroupVII. halogen melting point / °C boiling point / °C density of liquid at boiling point in g / cm3 chlorine –101 –35 1.56 bromine –7 iodine 4.93 astatine 6.35 Complete the table by predicting: ● the boiling point of iodine ● the density of bromine. Describe the trend in the melting points of the halogens down GroupVII. Deduce the electronic structure of chlorine. Use the Periodic Table to help you. Explain why a bromide ion has a single negative charge. Scientists have predicted that sodium astatide reacts with chlorine. Complete the word equation for this reaction. sodium astatide + chlorine → +  Hydrogenchloride is produced when chlorine reacts with ammonia. An aqueous solution of hydrogenchloride is acidic. Describe how you could determine the pH of an acidic solution without using a pH meter. 
0620_w21_qp_33
THEORY
2021
Paper 3, Variant 3
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Questions Discovered
123