Symbol Mn Atomic radius: pm 137 Fusion: kJ/Mole 12.91
Name Manganese Ionic radius: pm (+2)67 Boiling point: C 2061
Atomic number 25 Electron affinity Unstable anion Melting point: C 1246
Atomic weight 54.94 1st  ion potential 7.43 Specific Heat Cap: J/(g K) 0.48
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.08
Configuration [Ar]3d54s2 Crystal structure BCC Electrical Cond 0.00695
Oxidation states 7,6,4,2,3 Density 7.3 Abundance: mg/kg-crust 950
Electronegativity 1.55 Vaporization: kJ/Mole 219.7    
Manganese was recognized as an element in 1774 by the Swedish chemist Carl Wilhelm Scheele.  It was isolated the same year by Scheele's associate, Johan Gottlieb Gahn. Uses - production of steel, batteries, ceramics, alloys