The chemical element of atomic number 99, a radioactive metal of the actinide series. Einsteinium does not occur naturally and was discovered in 1953 in debris from the first hydrogen bomb explosion. (Symbol: Es)
- They were named after two of the century's most creative physicists: einsteinium and fermium.
- All isotopes of einsteinium are radioactive, the most stable being einsteinium - 252 with a half life of 20.47 days.
- Atomic number 101 is a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles.
For editors and proofreaders
Line breaks: ein¦stein|ium
Definition of einsteinium in:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.