MeSH definition : Berkelium. A man-made radioactive actinide with atomic symbol Bk, atomic number 97,
and atomic weight 247. Its valence can be 3 or 4. Twelve isotopes have been produced
with mass numbers 240-251.; A man-made radioactive actinide with atomic symbol Bk, atomic number 97, and atomic
weight 247. Its valence can be 3 or 4. Twelve isotopes have been produced with mass
numbers 240-251.;
Berkelium. A man-made radioactive actinide with atomic symbol Bk, atomic number 97,
and atomic weight 247. Its valence can be 3 or 4. Twelve isotopes have been produced
with mass numbers 240-251. A man-made radioactive actinide with atomic symbol Bk, atomic number 97, and atomic
weight 247. Its valence can be 3 or 4. Twelve isotopes have been produced with mass
numbers 240-251.