(TXT) 18 Ar Argon (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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       +--------------------+
       | 18    _            |
       |      / \   _ __    |
       |     / _ \ | '__|   |
       |    / ___ \| |      |
       |   /_/   \_\_|      |
       |                    |
       |        Argon       |
       |       39.9 u       |
       +--------------------+
       
 (TXT) Wiki Article:           Argon
       Electron Configuration: [Ne]3s2 3p6
       Electronegativity:      
       Atomic Radius:          188 pm
       Ionization Energy:      15.760 eV
       Electron Affinity:      
       Oxidation States:       0
       Standard State:         Gas
       Melting Point:          83.8 K
       Boiling Point:          87.3 K
       Density:                0.0017837 g/cm3
 (DIR) Family:                 Noble gas
       Year Discovered:        1894
       Number of Neutrons:     22
       Number of Protons:      18
       Number of Electrons:    18
       Number of Valence:      8
       Valency:                0
       Group:                  18
       Period:                 3
 (DIR) Shell:                  p-shell
       Specific Heat:          0.520 J/g K
       Radioactive:            0
       Occurrence:             Natural
 (DIR) Source:                 Dying high-mass stars
 (DIR) Source:                 White dwarf supernovae