1a1 mark
This question is about the elements in Group 7.
Use your knowledge of the trends in the properties of Group 7 elements to predict the colour and physical state of astatine at room temperature.
1b3 marks
i)
State the meaning of the term electronegativity.
(1)
ii)
Explain the trend in electronegativity down Group 7.
(2)
1c6 marks
Compare and contrast the reactions of chlorine with
- water
- cold, dilute aqueous alkali
- hot, concentrated aqueous alkali
Include an equation for each reaction, stating the type of reaction and the oxidation numbers of the chlorine involved. State symbols are not required.
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