Mendeleev's Periodic Table > Mn - Manganese

Mn - Manganese

A transition metal. The metal discovered in 1770 by Ignatius Kaim, investigated by Bergman and Scheele and finally isolated by swedish mineralist Johann Gottlieb Gahn. The metal is gray-white, resembling iron, but is harder and very brittle. The metal is reactive chemically, and decomposes cold water slowly. Manganese is widely distributed throughout the animal kingdom. It is an important trace element and may be essential for utilisation of vitamin B. Manganese is present in quantity the floor of oceans. It is an important component of steel.

Atomic number	-	25		Density	g/mL	7	.43
Atomic weight	u	54	.938	Melting point	K	1517
Bonding radius	A	1	.17	Boiling point	K	2335
Atomic radius	A	1	.79	Heat of vaporization	kJ/mol	226
Ionization Potential	V	7	.435	Heat of fusion	kJ/mol	12	.05
Electronegativity	-	1	.55	Specific heat	J/gK	0	.48
The oxide is a strong acid.				Crystal are body centered cubic.
Electron config. : [Ar] 3d⁵ 4s²

Isotopes of Mn (Manganese):

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	046 41 msec EC/ECp,7.603 Cr-46/V-45 45.986720	047 200 nsec ECp,7.520 MeV V-46 46.976102	048 158.1 msec EC/ECa/ECp,13.530 Cr-48/Ti-44/V-47 47.968555	049 382 msec EC,7.715 MeV Cr-49 48.959622
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	050 283.88 msec EC,7.633 MeV Cr-50 49.954243	050a 1.75 min EC,7.862 MeV Cr-50 49.954489	051 46.2 min EC,3.208 MeV Cr-51 50.948215	052 5.591 da EC,4.712 MeV Cr-52 51.945569
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	052a 21.1 min EC,5.090 MeV Cr-52 51.945975	053 3.74E+6 yr EC,3.436 MeV Cr-53 52.941294	054 312.3 da B-/EC,1.377 Fe-54/Cr-54 53.940363	055 100% Stable 54.938049
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	056 2.5785 hr B-,3.695 MeV Fe-56 55.938909	057 85.4 sec B-,2.691 MeV Fe-57 56.938287	058 3.0 sec B-,6.250 MeV Fe-58 57.939988	059 4.6 sec B-,5.190 MeV Fe-59 58.940450
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	060 51 sec B-,8.630 MeV Fe-60 59.943349	061 0.71 sec B-,7.350 MeV Fe-61 60.944637	062 0.88 sec B-,10.400 MeV Fe-62 61.947933	063 0.25 sec B-,8.800 MeV Fe-63 62.949758
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	065 200 nsec B-,10.400 MeV Fe-65 64.956092

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