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Bk

Symbol, Chemistry
1.

bk

Baseball.
1.
balk.

bk.

1.
bank.
2.
book.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Bk

bk

abbreviation
1.
bank
2.
book

Bk

Chemical symbol
1.
berkelium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Bk in Medicine

Bk
The symbol for the element berkelium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Bk in Science
Bk  
The symbol for berkelium.
berkelium
  (bər-kē'lē-əm, bûrk'lē-əm)   
Symbol Bk
A synthetic, radioactive metallic element of the actinide series that is produced from americium, curium, or plutonium. Its most stable isotope has a half-life of about 1,400 years. Atomic number 97; melting point 986°C; valence 3, 4. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Related Abbreviations for Bk

bk

black

Bk

berkelium

BK

because

Bk.

  1. bank
  2. book
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for Bk

synthetic chemical element of the actinoid series of the periodic table, atomic number 97. Not occurring in nature, berkelium (as the isotope berkelium-243) was discovered in December 1949 by Stanley G. Thompson, Albert Ghiorso, and Glenn T. Seaborg at the University of California at Berkeley as a product resulting from the helium-ion bombardment of americium-241 (atomic number 95) in a 152-centimetre (60-inch) cyclotron. All berkelium isotopes are radioactive; berkelium-247 is the longest lived (1,400-year half-life). Berkelium-249 (314-day half-life) has been widely used in the chemical studies of the element because it can be produced in weighable amounts that are isotopically pure by nuclear reactions beginning with curium-244. Metallic berkelium has not yet been prepared, but it should be electropositive, reactive, and silver-coloured like the other actinide metals, with a specific gravity of about 14. Tracer chemical investigations have shown that berkelium exists in aqueous solutions in the +3 and +4 oxidation states, presumably as Bk3+ and Bk4+ ions. The solubility properties of berkelium in its two oxidation states are entirely analogous to those of the other actinoids and to the lanthanoid elements in the corresponding oxidation states. Solid compounds, including the oxides BkO2 and Bk2O3 and the chloride BkCl3, have been synthesized on the submicrogram scale

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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