Group 7: The Halogens (AQA GCSE Chemistry): Flashcards
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Chlorine's colour and state
Chlorine's colour and state
Yellow-green gas
Bromine's colour and state
Bromine's colour and state
Orange-red liquid
Iodine solid appearance & vapour colour
Iodine solid appearance & vapour colour
Shiny grey solid; purple vapour
Reactivity trend down Group 7
Reactivity trend down Group 7
Decreases
Outer electrons in Group 7 elements
Outer electrons in Group 7 elements
7 electrons
Why reactivity decreases down Group 7
Why reactivity decreases down Group 7
Outer electrons further from nucleus, less attraction
Appearance of metal halides (salts)
Appearance of metal halides (salts)
White solids
Chlorine's use in water treatment
Chlorine's use in water treatment
Disinfectant to kill bacteria
Chlorine dissolved in NaOH forms
Chlorine dissolved in NaOH forms
Bleach (sodium chlorate(I), )
Iodine's medical use
Iodine's medical use
Antiseptic to kill bacteria
Difference: antiseptic vs disinfectant
Difference: antiseptic vs disinfectant
Antiseptic safe on skin; disinfectant stronger
Fluorides added to toothpaste do what?
Fluorides added to toothpaste do what?
Reduce dental decay
Use of silver bromide & silver iodide
Use of silver bromide & silver iodide
Photographic film (light-sensitive)
Salt () mixed with grit for what?
Salt () mixed with grit for what?
Prevent roads freezing
Products of electrolysis
Products of electrolysis
Chlorine gas, hydrogen gas, sodium hydroxide