85  Astatine

 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      

+--------------------+
| 85     _   _       |
|       / \ | |_     |
|      / _ \| __|    |
|     / ___ \ |_     |
|    /_/   \_\__|    |
|                    |
|      Astatine      |
|     209.98715 u    |
+--------------------+

Electron Configuration: [Xe]6s2 4f14 5d10 6p5
Electronegativity:      2.2
Atomic Radius:          202 pm
Ionization Energy:      9.5 eV
Electron Affinity:      2.8 eV
Oxidation States:       7, 5, 3, 1, -1
Standard State:         Solid
Melting Point:          575 K
Boiling Point:          
Density:                7 g/cm3
Family:                 Halogen
Year Discovered:        1940
Number of Neutrons:     125
Number of Protons:      85
Number of Electrons:    85
Number of Valence:      7
Valency:                1
Group:                  17
Period:                 6
Shell:                  p-shell
Specific Heat:          
Radioactive:            1
Occurrence:             Rare
Source:                 Radioactive decay