(TXT) 90 Th Thorium (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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| 90 _____ _ |
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| | | | '_ \ |
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| |_| |_| |_| |
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| Thorium |
| 232.038 u |
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(TXT) Wiki Article: Thorium
Electron Configuration: [Rn]7s2 6d2
Electronegativity: 1.3
Atomic Radius: 237 pm
Ionization Energy: 6.08 eV
Electron Affinity:
Oxidation States: 4
Standard State: Solid
Melting Point: 2023 K
Boiling Point: 5061 K
Density: 11.72 g/cm3
(DIR) Family: Actinide
Year Discovered: 1828
Number of Neutrons: 142
Number of Protons: 90
Number of Electrons: 90
Number of Valence:
Valency:
Group:
Period: 7
(DIR) Shell: f-shell
Specific Heat: 0.113 J/g K
Radioactive: 1
Occurrence: Natural
(DIR) Source: Merging neutron stars