Generally, the Noble gases are considered the least reactive elements, such as Neon, Xenon etc. But Helium is perhaps more sterile than them, as it does not react with anything at all. There are certain elements which rarely react, such asPlatinum, etc. read more
Neon is the least reactive element on the periodic table. As a noble gas, neon is colorless and odorless with extremely low reactivity in its natural state. Neon has an atomic number of 10. read more
Noble gasses (group 8) are the least reactive elements in the periodic table because they have a full valence shell. The right-most column, Group 8*, or the noble gases, is the least reactive elements in the periodic table. read more