ISOTOPES
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BTCHEMICAL FORMULAS + RADICALS + ISOTOPES (CHEMISTRY)
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UDC54.027
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Descriptor GERISOTOPE
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Descriptor ENGISOTOPES
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Descriptor FREISOTOPES
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NTSEMIMETALS ISOTOPES
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NTISOTOPE SEPARATION (CHEMISTRY)
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NTMETAL ISOTOPES
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NTNON-METAL ISOTOPES
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NTRADIOACTIVE ISOTOPES
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RTATOMIC MASS + ISOTOPES (ATOMIC PHYSICS)