Manganese Element Properties

Manganese

d24
Cr
Chromium
d25
Mn
Manganese
d26
Fe
Iron
General
Name(Manganese)
Symbol(Mn)
Number(25)
Group Number(7)
Group(Transition metals)
Block(d)
Density(7.43 g/cm3)
Atomic Weight(54.9380 g/mol)
Atomic Volume(1.39 cm3/mol)
Discover(1774)


States
State(Solid)
Melting Point(1519 K)
Boiling Point(2334 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(12.91 kJ/mol)
Heat of Vaporization(221 kJ/mol)


Energies
First Ionization Energy(717.4 kJ/mole)
Second Ionization Energy(1509 kJ/mole)
Third Ionization Energy(3248.3 kJ/mole)
Electronegativity(1.55)
Electron Affinity(Nil)
Specific Heat(0.48 J/gK)
Heat Atomization(281 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,13,2)
Electron Configuration([Ar] 3d5 4s2)
Minimum Oxidation Number(-3)
Maximum Oxidation Number(7)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(7)


Appearance and Characteristics
Crystal Structure(cubic A12)
Characteristics(hard, brittle)
Color(gray-white)
Uses(steel, dry cells(MnO2))
Hardness(5 mohs)
Toxicity(None)


Reactions
Reaction with Air(mild, w/ht =>Mn3O4, Mn3N2)
Reaction with 6M HCl(mild, =>H2, MnCl2)
Reaction with 15M HNO3(mild, =>Mn(NO3)2, NOx)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(None)
Oxide(MnO Mn3O4 Mn2O3 MnO2 Mn2O7)
Chloride(MnCl2)


Radius
Atomic Radius(127 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(89 pm)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(75.3 pm)


Conductivity
Thermal Conductivity(7.81 J/m-sec-deg)
Electrical Conductivity(5.405 1/mohm-cm)
Polarizability(9.4 A3)


Abundance
Source(Pyrolusite,psilomelane(oxide))
Relation Abundance Solar System(3.980 log)
Abundance Earths Crust(3 log)


d24
Cr
Chromium
d25
Mn
Manganese
d26
Fe
Iron

english Calculators and Converters


Sitemap