25  Manganese

 H                                                  He
 Li Be                               B  C  N  O  F  Ne
 Na Mg                               Al Si P  S  Cl Ar
 K  Ca Sc Ti V  Cr[Mn]Fe Co Ni Cu Zn Ga Ge As Se Br Kr
 Rb Sr Y  Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I  Xe
 Cs Ba La Hf Ta W  Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
                                                      
       Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu      
       Th Pa U  Np Pu Am Cm Bk Cf Es Fm Md No Lr      

+--------------------+
| 25 __  __          |
|   |  \/  |_ __     |
|   | |\/| | '_ \    |
|   | |  | | | | |   |
|   |_|  |_|_| |_|   |
|                    |
|      Manganese     |
|     54.93804 u     |
+--------------------+

Electron Configuration: [Ar]4s2 3d5
Electronegativity:      1.55
Atomic Radius:          197 pm
Ionization Energy:      7.434 eV
Electron Affinity:      
Oxidation States:       +7, +4, +3, +2
Standard State:         Solid
Melting Point:          1519 K
Boiling Point:          2334 K
Density:                7.3 g/cm3
Family:                 Transition metal
Year Discovered:        1774
Number of Neutrons:     30
Number of Protons:      25
Number of Electrons:    25
Number of Valence:      
Valency:                
Group:                  7
Period:                 4
Shell:                  d-shell
Specific Heat:          0.479 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 White dwarf supernovae