GROUP VIII: THE NOBLE GASES (SIMILARITIES WITHIN THE GROUP (density &…
GROUP VIII: THE NOBLE GASES
(oxygen would react with hot metals being welded, and hot tungsten)
the unreactivity of noble gases makes them very useful.
argon is used to provide an inert atmosphere, for example in welding and in tungsten light bulbs.
helium is used in balloons and airships because it is lighter than air, and non-flammable
WHY ARE THEY UNREACTIVE?
they do not need to bond to other atoms to gain, or lose, electrons.
their atoms have a stable arrangement of outer-shell electrons.
colorless gas (
SIMILARITIES WITHIN THE GROUP
density & boiling points increase down the group
but their physical properties show trends down the group
- they do not normally react with anything
they exists as single atoms - they are
they are colorless gases, and occur naturally in air
All elements are non-metals