Electron Configuration Of Oxygen Ion. The 2 charge means it gained 2 electrons to achieve an octet. Because it has one unpaired electron it is paramagnetic.
8 valence electrons it is now like neon and has the noble gas configuration of neon. Based on the fill order above these 8 electrons would fill in 1s 2s and then 2p in the following order. So the electron configuration of oxygen s would be o 1s22s22p4.
The br atom has 4s 2 3d 10 4p 5 as the electron configuration.
Each element has a unique atomic structure that is influenced by its electronic configuration which is the distribution of electrons across different orbitals of an atom. 8 valence electrons it is now like neon and has the noble gas configuration of neon. There are 118 elements in the periodic table. Electron configuration of oxygen for example.