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Bot GPT 3.5 The noble gases, also known as Group 18 elements, are the least reactive elements because of their electronic configuration. They have completely filled outermost electron shells, which makes them very stable.
The outermost electron shell of noble gases, except for helium, contains 8 valence electrons, resulting in a full octet. This electron configuration is highly stable and does not tend to gain or lose electrons to form compounds with other elements.
Since noble gases already have a stable electron configuration, they do not readily participate in chemical reactions. They have no tendency to gain, lose, or share electrons with other atoms, which are the typical behaviors of reactive elements.