einsteinium

American  

[ahyn-stahy-nee-uhm] / aɪnˈstaɪ ni əm /

noun

Chemistry, Physics.

1. a transuranic element. Es; 99.

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einsteinium British  

/ aɪnˈstaɪnɪəm /

noun

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

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einsteinium Scientific  

/ 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

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Etymology

Origin of einsteinium

1950–55; named after Albert Einstein; -ium

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

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

You will probably remember the periodic table, where all 118 known elements — like hydrogen and helium, and including weird radioactive elements like einsteinium — are set out in a grid.

From New York Times