Respuesta :
The characteristics of the percentage allow finding that the abundance of the second isotope is
b = 100 - a%
Chemical elements are stable structures that appear in the periodic table, these structures can have some variations, changing the number of protons changes the type of chemical element, but changing the number of neutrons, with the same atomic number, the elements with all their hardware properties, this type of atoms is called isotopes.
In this case it is said that the element X has two isotopes, if the abundance of one of them is a, the sum of all the abundances must give the total value of 1 or 100%,
the total abundance is
1 = a + b
b = 1- a
this is the abundance of the other isotope, if you prefer it can be given as a percentage
b = 100 - a%
In conclusion using the characteristics of the percentage we can find the abundance of the second isotope is
b = 100 - a%
learn more about percentage here:
https://brainly.com/question/21814361
