2.6: Use Knowledge of Trends in Group 7 to Predict the Properties of Other Halogens

HALOGENS: Group 7 Non-Metals that are poisonous and commonly includes Chlorine, Bromine and Iodine

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PROPERTIES OF OTHER HALOGENS (FLUORINE AND ASTATINE):

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1. MELTING AND BOILING POINT

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• Melting and Boiling Point of Halogens increases as you go down the Group
• Fluorine is at the top of Group 7 so will have the lowest melting and boiling point
• Astatine is at the bottom of Group 7 so will have the highest melting and boiling point

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2. STATES

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• State of Halogens become harder and more set as you go down the Group
• Fluorine is at top of Group 7 so will be a Gas
• Astatine is at the bottom of Group 7 so will be a Solid

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3. COLOUR

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• Colour of Halogens become darker as you go down the Group
• Fluorine is at the top of Group 7 so will be lighter coloured : Yellow
• Astatine is at the bottom of Group 7 so will be darker coloured : Black