Electron Configurations of Ions from a Single Atom

Electron Configurations of Ions from a Single Atom 

Electron configurations of atoms were discussed in some detail in Chapter 3. Emphasis has been placed on the stability of a stable octet of outer shell electrons, which is characteristic of a noble gas. Such an octet is in the ns np electron configuration. The first element to have this configuration is neon, electron configuration WliP lp. (Recall that helium is also a noble gas, but with only 2 electrons, its electron configuration is simply b. ) The next noble gas beyond neon is argon, which has the electron configuration ls 2s 2p 3s 3p, commonly abbreviated NelBs Bp . 

The electron configurations of ions consisting of only one atom can be shown in the same way as illustrated for atoms above. For the lighter elements, the electron 

Element Electron Configuration Gained/Lost Ion Configuration  

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