Question

Question 3 (1 point)

The average atomic mass of molybdenum (Mo) is 95.94 amu. Which of the following
isotopes must have the highest percent abundance?
Mo-96
Not enough information to tell
Mo-95
Mo-94

Answer 1

Mo-96

Step-by-step explanation:

We know that isotopes are elements that have different numbers of neutrons while electron and proton numbers stay the same. Some isotopes exist in greater numbers than others. The atomic mass is the average of all the existing isotopes of an element. Therefore, the number the atomic mass is closest to is the most abundant isotope. We can round 95.94 to 96 because that is the closest number. That means that Mo-96 is the most abundant.