Textbook ExpertVerified Tutor
1 Nov 2021
Given information
Here the given information is:
Two naturally occurring isotopes of lithium are 
and 
.
The natural abundance of is 
% and that of is 
%
The mass of isotope 
The mass of isotope 
We have to determine the mass closest to the atomic mass of 'Li'.
Step-by-step explanation
Step 1.
Isotopes can be defined as atoms that have the same atomic number but different mass numbers.
Since isotopes have the same atomic number, they have the same number of protons and electrons. The difference in their mass numbers arises because they contain different numbers of neutrons in their nuclei.
The atomic mass of an element indicates how many times the mass of one atom of the element is heavier in comparison to 
part of the mass of one atom of 
.
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Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944