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Boron, Lithium, Nitrogen, and Neon each have 2 stable isotopes. In which of the following pairs of isotopes is the heavier isotope abundant?A) 6Li or 7Li (avg. mass 6.941 amu)B) 10B or 11B (avg. mass 10.81 amu)C) 20Ne or 22 (avg. mass 20.18 amu)D) 14N or 15N (avg. mass 14.01 amu)

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