| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| berkelium |
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| SYLLABICATION: | ber·ke·li·um |
| PRONUNCIATION: |  b r-k  l-m, bûrkl-m |
| NOUN: | Symbol Bk A synthetic transuranic radioactive element having 9 isotopes with mass numbers from 243 to 250 and half-lives from 3 hours to 1,380 years. Atomic number 97; melting point 986°C; valence 3, 4. See table at element. | | ETYMOLOGY: | After Berkeley, California.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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