52 Tellurium 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 +--------------------+ | 52 _____ | | |_ _|__ | | | |/ _ \ | | | | __/ | | |_|\___| | | | | Tellurium | | 127.6 u | +--------------------+ Electron Configuration: [Kr]5s2 4d10 5p4 Electronegativity: 2.1 Atomic Radius: 206 pm Ionization Energy: 9.010 eV Electron Affinity: 1.971 eV Oxidation States: +6, +4, -2 Standard State: Solid Melting Point: 722.66 K Boiling Point: 1261 K Density: 6.232 g/cm3 Family: Metalloid Year Discovered: 1782 Number of Neutrons: 76 Number of Protons: 52 Number of Electrons: 52 Number of Valence: 6 Valency: 2 Group: 16 Period: 5 Shell: p-shell Specific Heat: 0.202 J/g K Radioactive: 0 Occurrence: Natural Source: Dying low-mass stars Source: Merging neutron stars