Answer: The atomic mass of these two isotopes is 40.03 amu. The average mass is closer to actual amu of 58.69 for nickel as its percentage abundance is more.
Explanation:
Mass of isotope 1 = 63.93
% abundance of isotope 1 = 0.93% = [tex]\frac{0.93}{100}[/tex]
Mass of isotope 2 = 57.93
% abundance of isotope 2 = (68.08)% = [tex]\frac{68.08}{100}[/tex]
Formula used for average atomic mass of an element :
[tex]\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})[/tex]
[tex]A=\sum[(63.93)\times \frac{0.93}{100})+(57.93)\times \frac{68.08}{100}]][/tex]
[tex]A= 40.03amu[/tex]
Therefore, the average atomic mass of nickel is, 40.03 amu. The average mass is closer to actual amu of 58.69 for nickel as its percentage abundance is more.
