groups halogens and noble gasses CP2 Flashcards
where are alkali metals found on the periodic table
in group 1
(the first column)
what are the physical properties of an alkali metal
non-metals
7 outer electrons
poor conductors
poisonous
diotomic-exist in airs
what happens when you add lithium to water
just fizzes
what happens when you add sodium to water
heat is released and fizzes
what happens when you add potassium to water
the metal will self ignite
how many electrons do alkali metals have in there outer shell
7
explain reactivity in group 1
as you move down the column the group gets more reactive
what is the balanced equation for sodium hydroxide
2 Na ( s ) + 2 H 2 O ( l ) → 2 NaOH ( aq ) + H 2 ( g )
where are the halogens found on the periodic table
in group 7
what is a halogen
reactive non-metal
why are halogens dangerous
they are toxic
give the colour and state for Florine
yellow
gas
give the colour and state for chlorine
greenish-yellow
gas
give the colour and state for bromine
brownish-red
liquid
give the colour and state for iodine
black-grey
solid
what is the halogens trend in colour and boiling point
colour-gets darker as you move down the group
boling point -increases as you go down the group
trend in reactivity of halogens
as you move up the group they are more reactive
what is a noble gas
an unreactive gas
where are noble gasses found
in group 18 or 0
how many electrons are in a noble gases outer shell
they have a full outer shell - this makes them unreactive
inert meaning
unreactive
why is helium used in balloons instead of hydrogen
helium is not flammable
why is argon used to fill light bulbs
to prevent corrosion of the filament
