ns²np⁴
Where:
* n represents the principal quantum number, which corresponds to the period number the element is in.
For example:
* Oxygen (O), in period 2, has a valence electron configuration of 2s²2p⁴.
* Sulfur (S), in period 3, has a valence electron configuration of 3s²3p⁴.
* Selenium (Se), in period 4, has a valence electron configuration of 4s²4p⁴.
This configuration means that Group 6A elements have 6 valence electrons, which are the electrons in the outermost shell and participate in chemical bonding.
