25 - Manganese transition metal
Discovered by Torbern Olof Bergman in 1774
Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.
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 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
57-71 La-Lu Lanthanides
89-103 Ac-Lr Actinides
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 13 | 2 in 3s + 6 in 3p + 5 in 3d |
| 4 | 2 | 2 in 4s |
54.9 u Atomic Mass
1.8 Å Atomic Radius
2.33k K Boiling Point
1.39 Å Covalent Radius
7.21 g/cm³ Density
−50 Electron Affinity
1.55 Electronegativity
7.43 eV First Ionization Energy
1.52k K Melting Point
4 Number of Shells
25 Atomic Number
2, 8, 13, 2 Electron Shell Occupations