Einsteinium (Es)
"The Genius, a hero born from a hydrogen bomb, named after the greatest mind of the 20th century."
A memorable persona to anchor Es in your mind.
8.84
Grams per cm³
860
Celsius (°C)
245
Radius (pm)
Daily Life Link
Einsteinium has no everyday connection, discovered in H-bomb debris.
Discovery & History
Year Discovered
1952
Discovered By
Albert Ghiorso and colleagues
Origin of Name
"Einsteinium is named after the renowned physicist Albert Einstein."
Technical Properties
Atomic Mass
[252] u
Standard State
solid
Boiling Point
N/A
Electron Configuration
[Rn] 5f117s2
1st Ionization Energy
6.42 eV
Electron Affinity
N/A
Oxidation States
"Einsteinium is a synthetic, highly radioactive metal."
Did You Know?
It was discovered unexpectedly in the debris from the first successful test of a hydrogen bomb, 'Ivy Mike', in 1952.
It was named in honor of the renowned physicist Albert Einstein.
It is the heaviest element on the periodic table that has ever been seen with the naked eye, though only in microscopic amounts.
The element is so radioactive that it glows with a blue light.