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Group c h group of elements, indicated by letter on the periodic table, has electrons with the valence-shell ground-state electron configuration ns2 np4.
The distribution of an element's atoms' electrons throughout several atomic orbitals is symbolically represented by the electronic configuration of that element. A standardised notation is used for expressing electron configurations, in which the energy level and type of orbital are written first, followed by the number of electrons in the orbital, which is expressed in superscript. For instance, the electronic structure of carbon, which has an atomic number of 6, is 1s22s22p2. Any atom's outermost shell is known as the valence shell, and the electrons that live there are known as valence electrons. Any atom's valence electrons have the ability to become free electrons when they receive enough energy from an external source to do so.
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