1s2 2s2 2p6 3s2 3p6
Noble gases, like helium, neon, and argon, have no unpaired electrons in their ground state electron configuration. This means that all of their electrons are paired up in orbitals.
The element is argon
The expected ground-state electron configuration of copper is ; however, the actual configuration is because a full dsubshell is particularly stable. There are 18 other anomalous elements for which the actual electron configuration is not what would be expected.
The electron configuration of 1s22s22p3s1 is not the ground state electron configuration of any element. This configuration contains 8 electrons, which in the ground state would be oxygen. The ground state configuration of oxygen is 1s22s22p4.
The ground state electron configuration for nitrogen is [He]2s2.2p3.
The ground state electron configuration of bromine is Ar 4s 3d 4p.
The ground-state electron configuration for the V3 ion is Ar 3d2.
Chloride anion Cl- has the same electron configuration as Argon (its succeding noble gas) so:Cl- has 18 electrons configured like: 1s2, 2s2 2p6, 3s23p6
The ground state electron configuration for iron (Fe) is Ar 3d6 4s2.
The ground state electron configuration of iron (Fe) is Ar 3d6 4s2.
Ground state electron configuration of zinc (Zn): [Ar]3d104s2.
The ground state electron configuration of Lanthanum is [Xe] 5d1 6s2.