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
Electron Configuration: [Rn]7s2 5f10
Electronegativity: 1.3
Atomic Radius: 245 pm
Ionization Energy: 6.30 eV
Electron Affinity:
Oxidation States: 3
Standard State: Solid
Melting Point: 1173 K
Boiling Point:
Density:
Family: Actinide
Year Discovered: 1950
Number of Neutrons: 153
Number of Protons: 98
Number of Electrons: 98
Number of Valence:
Valency:
Group:
Period: 7
Shell: f-shell
Specific Heat:
Radioactive: 1
Occurrence: Rare
Source: Human-made