Group 7: The Halogens (AQA GCSE Chemistry Combined Science): Flashcards
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Colour and state of chlorine
Colour and state of chlorine
Yellow-green gas
Colour and state of bromine
Colour and state of bromine
Orange-red liquid
Colour and state of iodine
Colour and state of iodine
Shiny grey solid
Reactivity trend in Group 7
Reactivity trend in Group 7
Decreases down the group
Outer electrons in Group 7 elements
Outer electrons in Group 7 elements
7 electrons
Melting and boiling point trend in Group 7
Melting and boiling point trend in Group 7
Increase down the group
Appearance of metal halides (salts) formed
Appearance of metal halides (salts) formed
White solids
Use of chlorine in water and pools
Use of chlorine in water and pools
Disinfectant to kill bacteria
Product when chlorine dissolves in NaOH
Product when chlorine dissolves in NaOH
Bleach (sodium chlorate(I), NaOCl)
Use of iodine on skin
Use of iodine on skin
Antiseptic to kill bacteria
Difference: antiseptic vs disinfectant
Difference: antiseptic vs disinfectant
Disinfectant stronger; antiseptic safe on skin
Use of fluorides in toothpaste
Use of fluorides in toothpaste
Reduce dental decay
Use of silver bromide and silver iodide
Use of silver bromide and silver iodide
Photographic film (light sensitive)
Why potassium iodide (KI) added to salt
Why potassium iodide (KI) added to salt
Prevent iodine deficiency in diet
Products from electrolysis of NaCl solution
Products from electrolysis of NaCl solution
Chlorine gas, hydrogen gas, sodium hydroxide