Question

Consider an element Z that has two naturally occuring isotopes with the following percent abundances: the isotope with a mass number 22.0 is 65.0% abundant; the isotope with a mass number 24.0 is 35.0% abundant. What is the average atomic mass for element Z? Round your answer to the hundredth.

Answer 1

Answer:

Z=22.70

Explanation:

It is given that,

An element Z that has two naturally occurring isotopes with the following percent abundances as follows :

The isotope with a mass number 22 is 65.0% abundant; the isotope with a mass number 24 is 35.0% abundant.

The average atomic mass for element Z is given by :

$Z=\dfrac{22\times 65+24\times 35}{100}\\\\Z=22.7$

So, the average atomic mass for element Z is 22.70.