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25Mn54.938
Manganese
Transition MetalManganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.
Phase: SolidAppearance: silvery metallic
2, 8, 13, 2
Physical Properties
Atomic Mass54.9380443 u
Density7.21 g/cm³
Melting Point1519 K
Boiling Point2334 K
Molar Heat26.32 J/(mol·K)
Period4
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d5
Semantic Config[Ar] 3d5 4s2
Shells2, 8, 13, 2
Electron Affinity-50 kJ/mol
Electronegativity1.55
Ionization Energies
IE1: 717.3 kJ/molIE2: 1509 kJ/molIE3: 3248 kJ/molIE4: 4940 kJ/molIE5: 6990 kJ/molIE6: 9220 kJ/molIE7: 11500 kJ/molIE8: 18770 kJ/molIE9: 21400 kJ/molIE10: 23960 kJ/molIE11: 27590 kJ/molIE12: 30330 kJ/molIE13: 33150 kJ/molIE14: 38880 kJ/molIE15: 41987 kJ/molIE16: 109480 kJ/molIE17: 118100 kJ/molIE18: 127100 kJ/molIE19: 138600 kJ/molIE20: 148500 kJ/molIE21: 158600 kJ/molIE22: 172500 kJ/molIE23: 181380 kJ/molIE24: 785450 kJ/molIE25: 827067 kJ/mol
Discovery
Discovered byTorbern Olof Bergman