| 1. | Fourteen isotopes of berkelium were identified with mass numbers 238 252.
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| 2. | Berkelium is a soft, silvery-white, radioactive metal.
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| 3. | The discoveries of americium, berkelium, and californium followed soon.
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| 4. | Berkelium is a soft, silvery-white, radioactive actinide metal.
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| 5. | Similar results are obtained with berkelium ( IV ) fluoride.
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| 6. | Most available berkelium toxicity data originate from research on animals.
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| 7. | Berkelium and cerium are then separated with another round of ion-exchange treatment.
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| 8. | Just over one gram of berkelium has been produced in the United States since 1967.
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| 9. | Berkelium is relatively soft and has one of the lowest GPa ( 2 Pa ).
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| 10. | The berkelium-249 isotope emits low-energy electrons and thus is relatively safe to handle.
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