Assertion: bohrium | /r/HasAspect | 11 known isotopes
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Source sentences:
text: Bohrium has 11 known isotopes that include 260Bh, 261Bh, 262Bh 264Bh, 265Bh, 266Bh, 267Bh 270Bh, 271Bh, 272B and 274Bh.