Helium.
It is a noble gas and so very unreactive.
The most common name for it is a "Noble gas" EDIT: Also Called An "Inert Gas"
argon
Argon is more dense than air.
The unreactive elemnyt in period 3 is Argon, Ar, a noble gas
Helium.
Helium
Nitrogen.
No. Neon is a noble gas and is unreactive.
Krypton is an unreactive gas.
It is a noble gas and so very unreactive.
No. Neon is a noble gas and is unreactive.
The most common name for it is a "Noble gas" EDIT: Also Called An "Inert Gas"
It is because zeon is a noble gas &unreactive
He- helium it is a noble gas (very unreactive)
Neon (Ne) is a noble gas, very unreactive.