88  Radium

 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      

+--------------------+
| 88  ____           |
|    |  _ \ __ _     |
|    | |_) / _` |    |
|    |  _ < (_| |    |
|    |_| \_\__,_|    |
|                    |
|       Radium       |
|     226.02541 u    |
+--------------------+

Electron Configuration: [Rn]7s2
Electronegativity:      0.9
Atomic Radius:          283 pm
Ionization Energy:      5.279 eV
Electron Affinity:      
Oxidation States:       2
Standard State:         Solid
Melting Point:          973 K
Boiling Point:          1413 K
Density:                5 g/cm3
Family:                 Alkaline earth metal
Year Discovered:        1898
Number of Neutrons:     138
Number of Protons:      88
Number of Electrons:    88
Number of Valence:      2
Valency:                2
Group:                  2
Period:                 7
Shell:                  s-shell
Specific Heat:          
Radioactive:            1
Occurrence:             Natural
Source:                 Radioactive decay