What is an electron configuration that belongs unto an element that is not chemically reactive?

An example of an electron configuration for a chemically non-reactive element is that of neon, which is 1s² 2s² 2p⁶. Neon is a noble gas with a full outer electron shell, making it stable and unreactive. Elements with full valence shells, like the noble gases, typically do not engage in chemical reactions because they do not need to gain, lose, or share electrons.