List of Alkali Metal Published on: April 9, 2020 | Last Updated on: August 15, 2023 by Fraiser Moorhouse Group of element – Alkali Metal NameSymbolAtomic NumberAtomic weigthLithiumLi36.941SodiumNa1122.989768PotassiumK1939.0983RubidiumRb3785.4678CesiumCs55132.90543FranciumFr87-223.0197