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atomic radius group 2
increases down the group
reactivity group 2
increases down the group
1st ionisation energy group 2
decreases down the group
solubility hydroxides group 2
increases down the group
solubility sulfates group 2
decreases down the group
atomic radius group 7
increases down the group
electronegativity group 7
decreases down the group
melting and boiling point group 7
increases down the group
mtp defintion
more electrons increased london forces more energy to break bonds
reactivity group 7
decreases down the group
oxidising power group 7
decreases down the group
halide ion reducing power
increases down the group
test for sulphate ions (SO4 2-)
acidified barium chloride forms a white ppt - barium sulfate
test for carbonate ion (CO3 2-)
add hydrochloric acid gas produced will be carbon dioxide - limewater test
test for ammonium ions
add sodium hydroxide warm gently red litmus paper turns blue
test for halide ions
Add dilute nitric acid then silver nitrate solution
test for halides - chloride
White precipitate of silver chloride
dilute ammonia - ppt dissolves
test for halides - bromide
Cream precipitate of silver bromide
conc ammonia - ppt dissolves
test for halides - iodide
Yellow precipitate of silver iodide
doesn't dissolve in ammonia
strontium flame
crimson
lithium flame
red
calcium flame
brick red
sodium flame
yellow
barium flame
green
potassium flame
lilac
magnesium flame
no colour
lithium carbonate thermal decomposition
Li2CO3 -> Li2O + CO2
group 2 carbonate thermal decomposition
MCO3 -> MO + CO2
group 1 nitrate thermal decomposition
metal oxide, brown fumes of nitrogen dioxide, and oxygen
thermal decomposition trend group 2
harder to decompose down group
lithium nitrate decomposing
2LiNO3 -> Li2O + 2NO2 + 1/2O2
group 1 nitrate decomposition
metal nitrite + oxygen
group 2 nitrate decomposition
metal oxide + nitrogen oxide + oxygen
flourine
pale green gas
chlorine
yellow gas
bromine
volatile brown liquid
iodine
volatile dark grey solid
halogen displacement
a more reactive halogen will displace a less reactive halogen
chlorine in water
colourless + water
chlorine in organic solvent
colourless
bromine in water
orange
bromine in organic solvent
orange + cyclohexane
iodine in water
red
iodine in organic solvent
dark purple
Note 
Flashcard (102)