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Why noble gases are non-reactive?
Noble gases have a full valence shell, so they do not react with other .
As you may or may not know, atoms of elements take and give electrons in order to form bonds and, therefore, . However, noble gases have a full valence shell (8 electrons in the valence shell).
Normally, in an atomic reaction, there is an instability in the atoms' valence shells. For example, oxygen has only 6 . In order for an atom to be completely stable it needs to have 8 . So, two hydrogen atoms with one electron each bond with the oxygen atom, creating a stabilization.
However, in the case of noble gases, their atoms already have a full valence shell, so there is no instability and no need to form bonds with other elements. In fact, noble gases got their name from their inactivity with other elements.
