92 Uranium 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 +--------------------+ | 92 _ _ | | | | | | | | | | | | | | | |_| | | | \___/ | | | | Uranium | | 238.0289 u | +--------------------+ Electron Configuration: [Rn]7s2 5f3 6d1 Electronegativity: 1.38 Atomic Radius: 240 pm Ionization Energy: 6.194 eV Electron Affinity: Oxidation States: +6, +5, +4, +3 Standard State: Solid Melting Point: 1408 K Boiling Point: 4404 K Density: 18.95 g/cm3 Family: Actinide Year Discovered: 1789 Number of Neutrons: 146 Number of Protons: 92 Number of Electrons: 92 Number of Valence: Valency: Group: Period: 7 Shell: f-shell Specific Heat: 0.116 J/g K Radioactive: 1 Occurrence: Natural Source: Merging neutron stars