Chemistry, 19.03.2020 20:28 realoneree

Consider an element Z that has two naturally occurring isotopes with the following percent abundances: the isotope with a mass number of 19.0 is 55.0% abundance and the isotope with a mass number of 21.0 is 45.0 % abundant. What is the atomic mass for element Z
A
20.0 amu

B
20.10 amu

C
19.90 amu

D
40.0 amu

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Consider an element Z that has two naturally occurring isotopes with the following percent abundance...