INORGANIC CHEMISTRY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site manganese (Mn) A gray-white or silvery, brittle metallic element occurring in several allotropic forms. Manganese is found wordlwide, especially in the ore pyrolusite. It is alloyed with steel to increase hardness, resistance, and other properties, and with other metals to form highly ferromagnetic materials. atomic number 25 relative atomic mass 54.938 relative density 7.21-7.44 melting point 1,246 °C (2,275 °F) boiling point 2,061 °C (3,742 °F) Related category    • INORGANIC CHEMISTRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP