85 At Astatine (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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| 85 _ _ | | |
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| Astatine | | |
| 209.98715 u | | |
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Wiki Article: Astatine | |
Electron Configuration: [Xe]6s2 4f14 5d10 6p5 | |
Electronegativity: 2.2 | |
Atomic Radius: 202 pm | |
Ionization Energy: 9.5 eV | |
Electron Affinity: 2.8 eV | |
Oxidation States: 7, 5, 3, 1, -1 | |
Standard State: Solid | |
Melting Point: 575 K | |
Boiling Point: | |
Density: 7 g/cm3 | |
Family: Halogen | |
Year Discovered: 1940 | |
Number of Neutrons: 125 | |
Number of Protons: 85 | |
Number of Electrons: 85 | |
Number of Valence: 7 | |
Valency: 1 | |
Group: 17 | |
Period: 6 | |
Shell: p-shell | |
Specific Heat: | |
Radioactive: 1 | |
Occurrence: Rare | |
Source: Radioactive decay |