Atomic NumberAtomic Number of Einsteinium
Atomic Number of Einsteinium is 99.
Chemical symbol for Einsteinium is Es. Number of protons in Einsteinium is 99. Atomic weight of Einsteinium is 252 u or g/mol. Melting point of Einsteinium is 860 °C and its the boiling point is unknown.
» Boiling Point » Melting Point » State at STP » Discovery YearAbout Einsteinium
One of the actinides, einsteinium is a chemical element which was discovered in the middle of the 20th century by a group of American scientists in the University of California. As the name suggests, it comes after Albert Einstein. It is a very toxic and radioactive metal which can only be obtained in nuclear reactors from such material as uranium. Einsteinium is dangerous to all living organisms and is used only with the purpose of scientific research. It is produced only in the amounts of a few grams every year.
Properties of Einsteinium Element
| Atomic Number (Z) | 99 |
|---|---|
| Atomic Symbol | Es |
| Group | |
| Period | 7 |
| Atomic Weight | 252 u |
| Density | 8.84 g/cm3 |
| Melting Point (K) | 1133 K |
| Melting Point (℃) | 860 °C |
| Boiling Point (K) | 1269 K |
| Boiling Point (℃) | unknown |
| Heat Capacity | |
| Abundance | 0 mg/kg |
| State at STP | Solid |
| Occurrence | Synthetic |
| Description | Actinide |
| Electronegativity (Pauling) χ | 1.3 |
| Ionization Energy (eV) | 6.42 |
| Atomic Radius | |
| Covalent Radius | |
| Valence Electrons | 2 |
| Year of Discovery | 1952 |
| Discoverer | Seaborg |