No individual Neon atom in the sample of the element has a mass of 20.18 amu. Explain.
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ANSWER: Neon has three isotopes Ne–20, Ne–21 & Ne–22, having percentage abundance of 90.92%, 0.26% & 8.82% respectively. When we calculate average of all these isotopic masses in proportion to their natural abundances, a fractional value of 20.18 amu is…