TEXT 68 Er Erbium (plaintext)
       
        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      
       
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       | 68  _____          |
       |    | ____|_ __     |
       |    |  _| | '__|    |
       |    | |___| |       |
       |    |_____|_|       |
       |                    |
       |       Erbium       |
       |      167.26 u      |
       +--------------------+
       
  TEXT Wiki Article:           Erbium
       Electron Configuration: [Xe]6s2 4f12
       Electronegativity:      1.24
       Atomic Radius:          235 pm
       Ionization Energy:      6.108 eV
       Electron Affinity:      
       Oxidation States:       3
       Standard State:         Solid
       Melting Point:          1802 K
       Boiling Point:          3141 K
       Density:                9.07 g/cm3
   DIR Family:                 Lanthanide
       Year Discovered:        1843
       Number of Neutrons:     99
       Number of Protons:      68
       Number of Electrons:    68
       Number of Valence:      
       Valency:                
       Group:                  
       Period:                 6
   DIR Shell:                  f-shell
       Specific Heat:          0.168 J/g K
       Radioactive:            0
       Occurrence:             Natural
   DIR Source:                 Merging neutron stars