12  Magnesium

 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      

+--------------------+
| 12 __  __          |
|   |  \/  | __ _    |
|   | |\/| |/ _` |   |
|   | |  | | (_| |   |
|   |_|  |_|\__, |   |
|           |___/    |
|      Magnesium     |
|      24.305 u      |
+--------------------+

Electron Configuration: [Ne]3s2
Electronegativity:      1.31
Atomic Radius:          173 pm
Ionization Energy:      7.646 eV
Electron Affinity:      
Oxidation States:       2
Standard State:         Solid
Melting Point:          923 K
Boiling Point:          1363 K
Density:                1.74 g/cm3
Family:                 Alkaline earth metal
Year Discovered:        1808
Number of Neutrons:     12
Number of Protons:      12
Number of Electrons:    12
Number of Valence:      2
Valency:                2
Group:                  2
Period:                 3
Shell:                  s-shell
Specific Heat:          1.023 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying high-mass stars