sentence: Valence electrons are important in how a chemical element reacts with other elements.
sentences_before: In chemistry, 'valence electrons' are the electrons in the outside or 'valence' electron shell of an atom.
sentences_after: 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.
concept_name: valence electron
headings: Valence electron
categories: Chemistry