einsteinium

einsteinium

 (Es) [īn-sti´ne-um]

a chemical element, atomic number 99, atomic weight 254. (See Appendix 6.)

ein·stein·i·um (Es),

(īn-stīn'ē-ŭm),

An artificially prepared transuranium element, atomic no. 99, atomic wt. 252.0; it has many isotopes, all of which are radioactive (²⁵²Es has the longest known half-life, 1.29 years).

[Albert Einstein]

einsteinium

/ein·stei·ni·um/ (Es) (īn-sti´ne-um) a chemical element, at. no. 99.

einsteinium (Es)

[īnstī′nē·əm]

Etymology: Albert Einstein, German-born physicist and Nobel laureate, 1879-1955

a synthetic transuranic metallic element. Its atomic number is 99. The mass of its longest-lived, best-known isotope is 254. Einsteinium was first found in the debris from a hydrogen bomb explosion. It decays rapidly into berkelium.

ein·stein·i·um

(īn-stī'nē-ŭm)

An artificially prepared transuranium element, atomic no. 99, atomic wt. 252.0; it has many isotopes, all of which are radioactive (²⁵²Es has the longest known half-life, 1.29 years).

[Albert Einstein]

einsteinium

a chemical element, atomic number 99, atomic weight 254, symbol Es. See Table 6.