Tantalum Element Properties, Transition metals Group, Periodic Table of the Elements
Tantalum
|
Tantalum Element Properties |
 | | General |
| Name | Tantalum |
| Symbol | Ta |
| Number | 73 |
| Group Number | 5 |
| Group | Transition metals |
| Block | d |
| Density | 16.6 g/cm3 |
| Atomic Weight | 180.947 g/mol |
| Atomic Volume | 10.90 cm3/mol |
| Discover | 1802 |
|
| States |
| State | Solid |
| Melting Point | 3290 K |
| Boiling Point | 5731 K |
| Triple Point | Nil |
| Critical Point | Nil |
| Heat of Fusion | 36.57 kJ/mol |
| Heat of Vaporization | 732.8 kJ/mol |
|
| Energies |
| First Ionization Energy | 761 kJ/mole |
| Second Ionization Energy | Nil |
| Third Ionization Energy | Nil |
| Electronegativity | 1.5 |
| Electron Affinity | 31.1 kJ/mole |
| Specific Heat | 0.14 J/gK |
| Heat Atomization | 782 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,18,32,11,2 |
| Electron Configuration | [Xe] 4f14 5d3 6s2 |
| Minimum Oxidation Number | -1 |
| Maximum Oxidation Number | 5 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 5 |
|
| Appearance and Characteristics |
| Crystal Structure | cubic body centered |
| Characteristics | hard, inert at <100 deg.C |
| Color | gray |
| Uses | surg. implants,heat exch. |
| Hardness | Nil |
| Toxicity | None |
|
| Reactions |
| Reaction with Air | None |
| Reaction with 6M HCl | None |
| Reaction with 15M HNO3 | None |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 2 |
| Hydride | TaH |
| Oxide | TaO2 Ta2O5 |
| Chloride | TaCl3 TaCl4 TaCl5 |
|
| Radius |
| Atomic Radius | 146 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | 86 pm |
|
| Conductivity |
| Thermal Conductivity | 57.5 J/m-sec-deg |
| Electrical Conductivity | 80.321 1/mohm-cm |
| Polarizability | 13.1 A3 |
|
| Abundance |
| Source | Tantalite (oxide) |
| Relation Abundance Solar System | -1.684 log |
| Abundance Earth's Crust | 0.3 log |
|
|
| 
