bohrium

American  

[bawr-ee-uhm] / ˈbɔr i əm /

noun

Chemistry, Physics.

1. a superheavy, synthetic, radioactive element with a very short half-life. Bh; 107.

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bohrium British  

/ ˈbɔːrɪəm /

noun

1. Former names: element 107.   unnilseptium.  a transuranic element artificially produced in minute quantities by bombarding ²⁰⁴ Bi atoms with ⁵⁴ Cr nuclei. Symbol: Bh; atomic no: 107

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bohrium Scientific  

/ bôr′ē-əm /

1. A synthetic, radioactive element that is produced by bombarding bismuth with chromium ions. Its most long-lived isotopes have mass numbers of 261, 262, and 264 with half-lives of 11.8 milliseconds, 0.1 second, and 0.44 second, respectively. Atomic number 107.

2. See Periodic Table

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Etymology

Origin of bohrium

First recorded in 1970–75; officially assigned to element 107 in 1997; named after Danish physicist Niels Bohr ; see -ium ( def. )

Example Sentences

Many are named after great scientists: einsteinium, curium, fermium, mendelevium, bohrium and rutherfordium.

From BBC • Sep. 19, 2014