Chemistry

Chemistry, 07.07.2019 17:00, moneyyfletcher

Hydrogen's atomic mass indicates that is the most abundant isotope

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Chemistry, 24.06.2019 23:30, angelyce4142

An element has three naturally occurring isotopes. the relative abundances of the isotopes are 0.27%, 9.25%, and 90.48%. the most abundant isotope has an atomic mass of 19.99 amu. the least abundant isotope has an atomic mass of 20.99 amu, and the remaining isotope has an atomic mass of 21.99 amu. based on these data, what is the average atomic mass of this element? (round your answer to the nearest hundredth and do not enter units in your answer.)

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Chemistry, 07.10.2019 19:10, jfox8741

There are two isotopes of hydrogen commonly found in nature. hydrogen-1 which has an atomic mass of 1.007751 amu and hydrogen-2 which has an atomic mass of 2.014741. which isotope of these two isotopes is the most abundant? hint: think about how the atomic mass of the element hydrogen is calculated.

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Chemistry, 08.10.2019 04:30, bonnysvalentine

Naturally occurring magnesium has an atomic mass of 24.312 and consists of three isotopes. the major isotope is 24mg, natural abundance 78.99%, relative atomic mass 23.98504. the next most abundant isotope is 26mg, relative atomic mass 25.98259. the third most abundant isotope is 25mg whose natural abun- dance is in the ratio of 0.9083 to that of 26mg. find the relative atomic mass of 25mg.

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Chemistry, 30.10.2019 09:31, alyssams1213

19. cerium is the most abundant rare earth metal. pure cerium ignites when scratched by even a soft object. it has four known isotopes: "ce (atomic mass = 135.907 amu), ce (atomic mass = 137.905 amu), 4°сe (atomic mass = 139.905 amu), and "ce (atomic mass = 141.909 amu). ce-140 and ce-142 are fairly abundant. which is the more abundant isotope?

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