Atomic Number of Einsteinium

Einsteinium Atomic Number

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 Year

About 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 SymbolEs
Atomic Weight252 u
Density8.84 g/cm3
Melting Point (K)1133 K
Melting Point (℃)860 °C
Boiling Point (K)1269 K
Boiling Point (℃)unknown
Heat Capacity
Abundance0 mg/kg
State at STPSolid
Electronegativity (Pauling) χ1.3
Ionization Energy (eV)6.42
Atomic Radius
Covalent Radius
Valence Electrons2
Year of Discovery1952

What is the Boiling Point of Einsteinium?

Einsteinium boiling point is unknown. Boiling point of Einsteinium in Kelvin is 1269 K.

What is the Melting Point of Einsteinium?

Einsteinium melting point is 860 °C. Melting point of Einsteinium in Kelvin is 1133 K.

What is the State of Einsteinium at Standard Temperature and Pressure (STP)?

State of Einsteinium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Einsteinium Discovered?

Einsteinium was discovered in 1952.