(TXT) 81 Tl Thallium (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      
       
 (DIR) Left
 (DIR) Up
 (DIR) Down
 (DIR) Right
 (DIR) List All
       
       +--------------------+
       | 81    _____ _      |
       |      |_   _| |     |
       |        | | | |     |
       |        | | | |     |
       |        |_| |_|     |
       |                    |
       |      Thallium      |
       |      204.383 u     |
       +--------------------+
       
 (TXT) Wiki Article:           Thallium
       Electron Configuration: [Xe]6s2 4f14 5d10 6p1
       Electronegativity:      1.62
       Atomic Radius:          196 pm
       Ionization Energy:      6.108 eV
       Electron Affinity:      0.2 eV
       Oxidation States:       +3, +1
       Standard State:         Solid
       Melting Point:          577 K
       Boiling Point:          1746 K
       Density:                11.8 g/cm3
 (DIR) Family:                 Post-transition metal
       Year Discovered:        1861
       Number of Neutrons:     123
       Number of Protons:      81
       Number of Electrons:    81
       Number of Valence:      3
       Valency:                3
       Group:                  13
       Period:                 6
 (DIR) Shell:                  p-shell
       Specific Heat:          0.129 J/g K
       Radioactive:            0
       Occurrence:             Natural
 (DIR) Source:                 Dying low-mass stars