Discovered By: Johan Gottlieb Gahn
Discovery year: 1774

The following table showing some properties of Manganese(Mn):

Table Example
Atomic number 25
Group 7
Period 4
Block d
Electrons 25
Protons 25
Neutrons 30
Atomic weight 54.938044
Oxidation states -1, +2, +3, +4, +5, +6, +7
Ionic charge Mn^2+, Mn^4+


Table Example
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^5
Atomic radius 161 pm
Covalent radius 139 pm
Boiling point 2061°C
Melting point 1246°C
Neel point 100 K
Phase Solid
Fusion heat 13.2 kJ.mol^-1
Thermal expansion 2.17*10^-5 K^-1
Vaporization heat 220 kJ.mol^-1


Table Example
Color Silver
Brinell hardness 196 MPa
Bulk modulus 120 GPa
Density 7470 kg.m^-3
Liquid density 5950 kg.m^-3
Mohs hardness 6
Sound speed 5150 m.s^-1
Thermal conductivity 7.8 W.m^-1.K^-1
Young's modulus 198 GPa
Electrical conductivity 6.2*10^5 S.m^-1


Table Example
Electric type Conductor
Magnetic type Paramagnetic
Volume magnetic susceptibility 9.0387*10^-4
Resistivity 1.6*10^-6 Ohm.m
Electronegativity 1.55
Valence 4
Eectron affinity 0 kJ.mol^-1
First ionization energy 717.3 kJ.mol^-1
Radioactive No
Neutron cross section 13.3 barn