Question
Gallium, which has an atomic mass of 69.723 amu, has two naturally occurring isotopes, Ga-69 and Ga-71. Which isotope occurs in greater abundance? Explain.
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The weight of each isotope is its relative abundance. Show more…
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The element gallium has an atomic mass of 69.723 amu and exists as two isotopes. One isotope is Ga-69 (68.926 amu) with an abundance of 60.111%. What is the mass in amu of the other isotope?
Gallium has two naturally occurring isotopes: gallium-69 (isotopic mass $=68.9256$ ) and gallium-71 (isotopic mass $=70.9247$ ). The atomic weight of gallium is $69.7231$. (a) Without doing any calculations, state which isotope has the greater abundance. (b) Calculate the percent abundance of each isotope.
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The Law of Multiple Proportions and Dalton's Atomic Theory
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