Chemistry, 10.07.2019 12:00 trisngle2565
Acertain element (x) has isotopes with mass numbers of 10 and 11. the x-10 isotope has an atomic mass of 10.013, and it represents 19.9% of all atoms of this element. the x-11 isotope has an atomic mass of 11.009, and it represents 80.1% of all atoms of this element. therefore, the average atomic mass, or atomic weight, of this element is amu.
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Acertain element (x) has isotopes with mass numbers of 10 and 11. the x-10 isotope has an atomic mas...
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