There are 6 noble gases: helium, neon, argon, krypton, argon and radon
Gases that are used everyday
noble gases are inert therefore they posses zero valency
Noble gases doesn't form many compounds because they are extremely unreactive.
Noble gases do not normally form compounds.
the noble gases, krypton, xenon and radon are larger than bromine
Noble gases do not react chemically with other noble gases.
inert gases / noble gases
Gases, hence noble "gases"
There are eight in all noble gases (except helium) because that forms a "full level" so that they are noble gases and not reactive.
The Group 18 elements are called the noble gases or sometimes inert gases. Wikipedia has information on the noble gases, and a link is provided.
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Noble gases are chemically inert.