bohr·i·um  (bôr'ē-əm, bōr'-)  n. Symbol Bh An artificially produced radioactive element with atomic number 107 whose 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. Also called unnilseptium. See Table at element. [After Niels Henrik David Bohr.] |
| bohrium (bôr'ē-əm) Pronunciation Key
Symbol Bh 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. See Periodic Table. |
bohrium
a synthetic element in Group VIIb of the periodic table. It is thought to be chemically similar to the rare metal rhenium.
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