- Noble Gas Rule
|The noble gases are, for all intents and purposes,
chemically inert - that is that they do not react. Examination
of their electronic configurations reveals that, except for helium,
they all have the filled s and p orbitals, i.e., ns2np6. This
observation suggests that we can attribute their lack of chemical
reactivity to this filled s and p electronic configuration.
- Noble Gas Electronic Configurations
|The lesson we take away from this observation
is that the ns2np6 electronic configuration is very stable. We
can expect that any element or ion that is isoelectronic with
a noble gas will also be stable. This observation is known as
the noble gas or "octet" rule.