99  Einsteinium

 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      

+--------------------+
| 99   _____         |
|     | ____|___     |
|     |  _| / __|    |
|     | |___\__ \    |
|     |_____|___/    |
|                    |
|     Einsteinium    |
|     252.0830 u     |
+--------------------+

Electron Configuration: [Rn]7s2 5f11
Electronegativity:      1.3
Atomic Radius:          245 pm
Ionization Energy:      6.42 eV
Electron Affinity:      
Oxidation States:       3
Standard State:         Solid
Melting Point:          1133 K
Boiling Point:          
Density:                
Family:                 Actinide
Year Discovered:        1952
Number of Neutrons:     153
Number of Protons:      99
Number of Electrons:    99
Number of Valence:      
Valency:                
Group:                  
Period:                 7
Shell:                  f-shell
Specific Heat:          
Radioactive:            1
Occurrence:             Synthetic
Source:                 Human-made