24  Chromium

 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      

+--------------------+
| 24   ____          |
|     / ___|_ __     |
|    | |   | '__|    |
|    | |___| |       |
|     \____|_|       |
|                    |
|      Chromium      |
|      51.996 u      |
+--------------------+

Electron Configuration: [Ar]3d5 4s1
Electronegativity:      1.66
Atomic Radius:          189 pm
Ionization Energy:      6.767 eV
Electron Affinity:      0.666 eV
Oxidation States:       +6, +3, +2
Standard State:         Solid
Melting Point:          2180 K
Boiling Point:          2944 K
Density:                7.15 g/cm3
Family:                 Transition metal
Year Discovered:        1797
Number of Neutrons:     28
Number of Protons:      24
Number of Electrons:    24
Number of Valence:      
Valency:                
Group:                  6
Period:                 4
Shell:                  d-shell
Specific Heat:          0.449 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 White dwarf supernovae