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91 Pa Protactinium (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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| 91 ____ | |
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| | _ \ __ _ | |
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| Protactinium | |
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| 231.03588 u | |
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Wiki Article: Protactinium |
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Electron Configuration: [Rn]7s2 5f2 6d1 |
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Electronegativity: 1.5 |
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Atomic Radius: 243 pm |
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Ionization Energy: 5.89 eV |
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Electron Affinity: |
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Oxidation States: +5, +4 |
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Standard State: Solid |
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Melting Point: 1845 K |
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Boiling Point: |
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Density: 15.37 g/cm3 |
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Family: Actinide |
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Year Discovered: 1913 |
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Number of Neutrons: 140 |
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Number of Protons: 91 |
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Number of Electrons: 91 |
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Number of Valence: |
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Valency: |
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Group: |
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Period: 7 |
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Shell: f-shell |
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Specific Heat: |
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Radioactive: 1 |
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Occurrence: Natural |
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Source: Radioactive decay |
