einsteinium

[ ahyn-stahy-nee-uhm ]

noun

, Chemistry, Physics.

1. a transuranic element. : Es; : 99.

einsteinium

/ aɪnˈstaɪnɪəm /

noun

1. a metallic transuranic element artificially produced from plutonium. Symbol: Es; atomic no: 99; half-life of most stable isotope, ²⁵²Es: 276 days

einsteinium

/ īn-stī′nē-əm /

1. A synthetic, radioactive metallic element of the actinide series that is usually produced by bombarding plutonium or another element with neutrons. It was first isolated in a region near the explosion site of a hydrogen bomb. Its longest-lived isotope is Es 254 with a half-life of 276 days. Atomic number 99; melting point 860°C.
2. See Periodic Table

Word History and Origins

Origin of einsteinium¹

1950–55; named after Albert Einstein; -ium

Word History and Origins

Origin of einsteinium¹

C20: New Latin, named after Albert Einstein

Example Sentences

"So if you take the whole periodic table, and start putting things together - like lead, aluminium, rubidium, einsteinium - there are billions of new alloys that you can now make that you couldn't make on Earth."

From BBC

Unlike in lighter elements, the large positive charge in einsteinium and other heavy elements causes electrons to travel at speeds that reach a sizable fraction of the speed of light.

From New York Times

They drank “an abundance of cocktails” and eventually named their new particle einsteinium, after the man who had suggested the bomb.

From The New Yorker

Nowadays, focus has shifted to supernova explosions and anomalous stars such as Przybylski's star, whose spectrum shows signs of einsteinium, which is otherwise never found in nature.

From Science Magazine

Over the course of 30 years, his inventions contributed to the discovery of americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, lawrencium, rutherfordium, dubnium and seaborgium.

From New York Times