Beryllium
Stable electronic configuration is when the valence shell of an element is completely filled (8 electrons) whereas unstable electronic configuration is when the valence shell of an element is not completely filled
Ce, cerium. Electronic configuration [Xe]4f15d16s2
Iron (Fe)
S
The electron configuration of cobalt is [Ar]3d7.4s2.
Stable electronic configuration is when the valence shell of an element is completely filled (8 electrons) whereas unstable electronic configuration is when the valence shell of an element is not completely filled
The element is Argon. Its configuration is 2 8 8.
definition of electronic configuration
Ce, cerium. Electronic configuration [Xe]4f15d16s2
the element is tungsten with the electronic configuration Xe 4f14 5d4 6s2
Iron (Fe)
The element chlorine does not have noble gas configuration. But chloride ion formed (when chlorine accepts an electron) has noble gas configuration of argon.
It is the electron configuration of a neutral, not excited atom.
Least to highest
Oxygen
S
valence electrons and electronic configuration.