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85 At Astatine (plaintext) |
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H He |
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Li Be B C N O F Ne |
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Na Mg Al Si P S Cl Ar |
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K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr |
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Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe |
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Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po[At]Rn |
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Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og |
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Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu |
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Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr |
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| 85 _ _ | |
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| Astatine | |
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| 209.98715 u | |
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Wiki Article: Astatine |
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Electron Configuration: [Xe]6s2 4f14 5d10 6p5 |
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Electronegativity: 2.2 |
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Atomic Radius: 202 pm |
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Ionization Energy: 9.5 eV |
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Electron Affinity: 2.8 eV |
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Oxidation States: 7, 5, 3, 1, -1 |
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Standard State: Solid |
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Melting Point: 575 K |
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Boiling Point: |
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Density: 7 g/cm3 |
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Family: Halogen |
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Year Discovered: 1940 |
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Number of Neutrons: 125 |
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Number of Protons: 85 |
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Number of Electrons: 85 |
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Number of Valence: 7 |
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Valency: 1 |
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Group: 17 |
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Period: 6 |
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Shell: p-shell |
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Specific Heat: |
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Radioactive: 1 |
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Occurrence: Rare |
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Source: Radioactive decay |
