|
52
Te
127.60
Tellurium |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Tellurium | Symbol: Te |
| Group: Non-Metal, Chalcogen | Atomic weight: 127.60 |
| Density @ 293 K: 6.24 g/cm3 | Atomic volume: 20.5 cm3/mol |
| Group: Non-Metal, Chalcogen | Discovered: 1783 |
States
| State (s, l, g): solid | |
| Melting point: 722.7 K | Boiling point: 1263 K |
| Heat of fusion: 17.490 kJ/mol | Heat of vaporization: 52.550 kJ/mol |
Energies
| 1st ionization energy: 869.2 kJ/mole | |
| Electronegativity: 2.1 | 2nd ionization energy: 1794.6 kJ/mole |
| Electron affinity: 190.16 kJ/mole | 3rd ionization energy: 2697.7 kJ/mole |
| Specific heat: 0.20 J/gK | Heat atomization: 197 kJ/mole atoms |
Oxidation & Electrons
| Shells: 2,8,18,18,6 | Electron configuration: [Kr] 4d10 5s2 5p4 |
| Minimum oxidation number: -2 | Maximum oxidation number: 6 |
| Min. common oxidation no.: 0 | Max. common oxidation no.: 6 |
Appearance & Characteristics
| Structure: parallel chains | Color: silvery |
| Uses: semiconductors, steel | Toxicity: yes |
| Hardness: 2.3 mohs | Characteristics: metalloid |
Reactions
| Reaction with air: mild, w/ht, => TeO2 | |
| Reaction with 6 M HCl: none | Reaction with 6 M HCl: none |
| Reaction with 15 M HNO3: mild, => Te(IV) | Reaction with 6 M NaOH: |
Other Forms
| Number of isotopes: 8 | Hydride(s): H2Te |
| Oxide(s): TeO2 TeO3 | Chloride(s): Te2Cl Te3Cl2 Te4Cl16 |
Radius
| Ionic radius (2- ion): 207 pm | Ionic radius (1- ion): pm |
| Atomic radius: 142 pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): pm | Ionic radius (3+ ion): pm |
Conductivity
| Thermal conductivity: 11.54 J/m-sec-deg | |
| Electrical conductivity: 0 1/mohm-cm | Polarizability: 5.5 A^3 |
Abundance
| Source: Zn/Pb smelting by-product | |
| Rel. abund. solar system: 0.682 log | Abundance earth's crust: -3 log |
| cost, pure: 24 $/100g | cost, bulk: $/100g |
