87  Francium

 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      

+--------------------+
| 87   _____         |
|     |  ___| __     |
|     | |_ | '__|    |
|     |  _|| |       |
|     |_|  |_|       |
|                    |
|      Francium      |
|     223.01973 u    |
+--------------------+

Electron Configuration: [Rn]7s1
Electronegativity:      0.7
Atomic Radius:          348 pm
Ionization Energy:      3.9 eV
Electron Affinity:      0.47 eV
Oxidation States:       1
Standard State:         Solid
Melting Point:          300 K
Boiling Point:          
Density:                
Family:                 Alkali metal
Year Discovered:        1939
Number of Neutrons:     136
Number of Protons:      87
Number of Electrons:    87
Number of Valence:      1
Valency:                1
Group:                  1
Period:                 7
Shell:                  s-shell
Specific Heat:          
Radioactive:            1
Occurrence:             Rare
Source:                 Radioactive decay