Element | Tellurium | Symbol | Te |
Atomic Number | 52 | Molar Mass | 127.6 gmol-1 |
Electron Configuration | [Kr]4d105s25p4 | Normal State | solid metalloid |
Density @STP | 6.25 g cm-3 | Melting Point | 450oC |
Boiling Point | 988oC | Stable Isotopes | 120Te, 122Te, 123Te, 124Te, 125Te, 126Te, 128Te, 130Te |
Atomic Radius | 137 pm | Ionic Radius | 221 (2-) pm |
Electronegativity (Pauling) | 2.1 | Ionization Energy (1st) | 869 kJ mol-1 |
Ionization Energy (2nd) | 1795 kJ mol-1 | Ionization Energy (3rd) | 2698 kJ mol-1 |
Molar Heat Capacity | 25.7 J K-1mol-1 | Standard Molar Entropy | 49.7 J K-1mol-1 |
Enthalpy of Fusion | 13.5 kJ mol-1 | Enthalpy of Vapourization | 50.63 kJ mol-1 |