Electronic data		Thermal data		Steric data
Shells: 2,8,13,2 Orbitals: [Ar] 3d5 4s2 Electronegativity: 1.6, 1.5 1. Ionization potential: 7.4340 eV 2. Ionization potential: 15.64 eV 3. Ionization potential: 33.667 eV Oxidation states: 7,6,4,3,2,0,-1 Electrical conductivity: 0.00695 10^6		Melting point: 1244 °C Boiling point: 2061 °C Specific heat: 0.48 J/gK Heat of fusion: 12.050 kJ/mol Heat of vaporization: 226.0 kJ/mol Thermal conductivity: 0.0782 W/cmK		Atomic radius: 1.79 Å Ionic radius: 0.67 Å () Covalent radius: 1.17 Å Atomic volume: 7.39 cm³/mol Density (293 K): 7.43 g/cm³ Crystal structure: Cubic: Body centered

Legend     Pocket calculator

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
52Mn	0	52	6	5.591d	EC,+	View
52Mnm	0	52	2	21.1m	+,EC,IT	View
53Mn	0	52.9413	7/2	3.7E06y	EC	View
54Mn	0	53.9402	3	312.2d	EC	View
55Mn	100	54.938	5/2	--	stable	--
56Mn	0	56	3	2.578h	-	View
57Mn	0	57	5/2	1.45m	-	View

Legend

Name origin:	Latin: magnes (magnet); Italian: manganese
Description:	Hard, brittle, gray-white metal with a pinkish tinge. Rusts like iron in moist air.
Discovered by:	Johann Gahn
Year:	1774
Place:	Sweden
Sources:	Most abundant ores are pyrolusite (MnO2), psilomelane [(Ba,H2O)2Mn5O10] and rhodochrosite (MnCO3). Pure metal produced by mixing MnO2 with powered Al and ignited in a furnace.
Use(s):	Used in steel, batteries and ceramics. The steel in railroad tracks can contain as much as 1.2% manganese. It is crucial to the effectiveness of vitamin B1.