11  Sodium

 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      

+--------------------+
| 11  _   _          |
|    | \ | | __ _    |
|    |  \| |/ _` |   |
|    | |\  | (_| |   |
|    |_| \_|\__,_|   |
|                    |
|       Sodium       |
|    22.9897693 u    |
+--------------------+

Electron Configuration: [Ne]3s1
Electronegativity:      0.93
Atomic Radius:          227 pm
Ionization Energy:      5.139 eV
Electron Affinity:      0.548 eV
Oxidation States:       1
Standard State:         Solid
Melting Point:          370.95 K
Boiling Point:          1156 K
Density:                0.97 g/cm3
Family:                 Alkali metal
Year Discovered:        1807
Number of Neutrons:     12
Number of Protons:      11
Number of Electrons:    11
Number of Valence:      1
Valency:                1
Group:                  1
Period:                 3
Shell:                  s-shell
Specific Heat:          1.228 J/g K
Radioactive:            0
Occurrence:             Natural
Source:                 Dying high-mass stars