Astatine Element Properties, Halogen Group, Periodic Table of the Elements
Astatine
|
Astatine Element Properties |
 | | General |
| Name | Astatine |
| Symbol | At |
| Number | 85 |
| Group Number | 17 |
| Group | Halogen |
| Block | p |
| Density | Nil |
| Atomic Weight | 210 g/mol |
| Atomic Volume | Nil |
| Discover | 1940 |
|
| States |
| State | Solid |
| Melting Point | 575 K |
| Boiling Point | 610 K |
| Triple Point | Nil |
| Critical Point | Nil |
| Heat of Fusion | Nil |
| Heat of Vaporization | 40 kJ/mol |
|
| Energies |
| First Ionization Energy | 890 kJ/mole |
| Second Ionization Energy | Nil |
| Third Ionization Energy | Nil |
| Electronegativity | 2.2 |
| Electron Affinity | 270 kJ/mole |
| Specific Heat | Nil |
| Heat Atomization | 92 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,18,32,18,7 |
| Electron Configuration | [Xe] 4f14 5d10 6s2 6p5 |
| Minimum Oxidation Number | -1 |
| Maximum Oxidation Number | 7 |
| Minimum Common Oxidation Number | -1 |
| Maximum Common Oxidation Number | 1 |
|
| Appearance and Characteristics |
| Crystal Structure | Nil |
| Characteristics | Radioactive |
| Color | Nil |
| Uses | Nil |
| 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 | 0 |
| Hydride | HAt |
| Oxide | None |
| Chloride | None |
|
| Radius |
| Atomic Radius | Nil |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | Nil |
|
| Conductivity |
| Thermal Conductivity | Nil |
| Electrical Conductivity | Nil |
| Polarizability | 6 A3 |
|
| Abundance |
| Source | Synthetic(Th or U decay) |
| Relation Abundance Solar System | Nil |
| Abundance Earth's Crust | Nil |
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