Group 7: The Halogens (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Appearance of chlorine
Appearance of chlorine
Yellow-green gas
Appearance of bromine
Appearance of bromine
Orange-red liquid; produces orange vapour
Appearance of iodine
Appearance of iodine
Shiny grey solid; produces purple vapour
Reactivity trend down Group 7
Reactivity trend down Group 7
Reactivity 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, weaker attraction, harder to gain electron
Melting & boiling point trend in Group 7
Melting & boiling point trend in Group 7
Both increase down the group
Appearance of metal halides (salts)
Appearance of metal halides (salts)
White solids
Use of chlorine in water
Use of chlorine in water
Disinfectant to kill bacteria
Formula of bleach (sodium chlorate(I))
Formula of bleach (sodium chlorate(I))
Antiseptic vs disinfectant
Antiseptic vs disinfectant
Antiseptic safe on skin; disinfectant stronger, damages skin
Use of iodine
Use of iodine
Antiseptic to kill bacteria
Use of fluorides
Use of fluorides
Added to toothpaste & water to reduce dental decay
Use of silver bromide & silver iodide
Use of silver bromide & silver iodide
Photographic film (sensitive to light)
Products from electrolysis of solution
Products from electrolysis of solution
Chlorine gas, hydrogen gas, sodium hydroxide