Atoms of the elements would react so as to achieve an _______________ of the configuration in the outermost shell.
octet
Noble gases such as neon and argon are chemically inert because their outermost shell already holds eight electrons, a very stable arrangement.
Other atoms react by gaining, losing or sharing electrons so that their valence shell ends up with the same eight-electron pattern; this generalisation is called the octet rule and drives ionic as well as covalent bond formation.
A duplet applies only to hydrogen and helium whose K-shell holds a maximum of two electrons, while triplet and heptet do not correspond to any stable noble-gas configuration.
Hence, atoms react so as to achieve an octet of the configuration in the outermost shell.
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