TEXT 72 Hf Hafnium (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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       | 72   _   _  __     |
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       |     | |_| | |_     |
       |     |  _  |  _|    |
       |     |_| |_|_|      |
       |                    |
       |       Hafnium      |
       |      178.49 u      |
       +--------------------+
       
  TEXT Wiki Article:           Hafnium
       Electron Configuration: [Xe]6s2 4f14 5d2
       Electronegativity:      1.3
       Atomic Radius:          212 pm
       Ionization Energy:      6.825 eV
       Electron Affinity:      
       Oxidation States:       4
       Standard State:         Solid
       Melting Point:          2506 K
       Boiling Point:          4876 K
       Density:                13.3 g/cm3
   DIR Family:                 Transition metal
       Year Discovered:        1923
       Number of Neutrons:     106
       Number of Protons:      72
       Number of Electrons:    72
       Number of Valence:      
       Valency:                
       Group:                  4
       Period:                 6
   DIR Shell:                  d-shell
       Specific Heat:          0.144 J/g K
       Radioactive:            0
       Occurrence:             Natural
   DIR Source:                 Dying low-mass stars
   DIR Source:                 Merging neutron stars