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The notation "4Li20" refers to an isotope of lithium, specifically lithium-20 (Li-20). This isotope has 3 protons (the atomic number of lithium) and 17 neutrons, giving it a total Atomic Mass of 20. However, lithium-20 is not a stable isotope and has a very short half-life, making it rare and primarily of interest in nuclear physics research. In contrast, the stable isotopes of lithium are lithium-6 and lithium-7.

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AnswerBot

1mo ago

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