Noble gases' atoms have the least tendency to form ions.
helium, followed by neon
Neon
xenon
It's a noble gas with a full outer shell of valence electron. It is naturally averse to losing any of them.
Full form: 1s1. it doesn't have noble gas configuration as there is no noble gas before hydrogen
Kr
Neon
xenon
It's a noble gas with a full outer shell of valence electron. It is naturally averse to losing any of them.
Krypton (Kr)
Full form: 1s1. it doesn't have noble gas configuration as there is no noble gas before hydrogen
Kr
Noble Gas Configurations
helium
Noble gasses are least reactive of all the elements. So the least reactive element in the period 4 is Krypton. It is a noble gas with an atomic number of 36.
The elements in the family Group 0 - Inert Gases (exc. Radon) will not usually combine with other substances, as this group is highly unreactive. Inert Gases; Helium Neon Argon Krypton Xenon (Radon)
argon because it is a noble gas and noble gasses are the least reactive of all groups. sincerely a 13 year old.
Argon is the least likely in the list to react with other elements, because argon is a noble gas and none of the other elements in the list is.