What is Valence electron?
In [[chemistry]], '''valence electrons''' are the [[electron]]s in the outside or ''valence'' [[electron shell]] of an [[atom]]. They determine the [[valency]] of the atom which is important in how a [[chemical element]] reacts with other elements. Elements which have eight valence electrons ([[noble gas]]es) are inert and they do not tend to create [[chemical reaction]]s with other elements in the [[Periodic table group]]. The number of valence electrons is also important for determining the group of an element in the Periodic table, because an element's number of valence electron is the same as the number of its group in the periodic table. To calculate the amount of valence electrons present in an element you have to find the last number of the electron configuration. {{chem-stub}} [[Category:Physical chemistry]]