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.

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: Click mass number for decay process, product for element page.

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	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	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	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	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	065 200 nsec B-,10.400 MeV Fe-65 64.956092
MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass

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