Atomic NumberAtomic Number of Astatine
Atomic Number of Astatine is 85.
Chemical symbol for Astatine is At. Number of protons in Astatine is 85. Atomic weight of Astatine is 210 u or g/mol. Melting point of Astatine is 302 °C and its the boiling point is 337 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Astatine
Astatine is a chemical element discovered closer to the middle of the last century by a group of Californian scientists. It is a very unstable and dangerous radioactive element which has got its name after the Greek word meaning unstable. Due to its high toxicity astatine is considered to be really dangerous to human life. It can be obtained in very small amounts in labs and, due to very high instability of this element, it is not easy to maintain it in its stable form. It has no industrial or commercial applications and is used only for research.
Properties of Astatine Element
| Atomic Number (Z) | 85 |
|---|---|
| Atomic Symbol | At |
| Group | 17 |
| Period | 6 |
| Atomic Weight | 210 u |
| Density | 7 g/cm3 |
| Melting Point (K) | 575 K |
| Melting Point (℃) | 302 °C |
| Boiling Point (K) | 610 K |
| Boiling Point (℃) | 337 °C |
| Heat Capacity | |
| Abundance | 3×10−20 mg/kg |
| State at STP | Solid |
| Occurrence | Transient |
| Description | Halogen |
| Electronegativity (Pauling) χ | 2.2 |
| Ionization Energy (eV) | |
| Atomic Radius | no datapm |
| Covalent Radius | no datapm |
| Valence Electrons | 7 |
| Year of Discovery | 1940 |
| Discoverer | Corson and MacKenzie |