Question

1. look at boron. it has two possible isotopes. based on the average atomic mass on the periodic table (10.81), which isotope is most abundant in nature? justify your answer.

Explanation:

The average atomic mass of boron is 10.81. The two isotopes of boron are boron - 10 and boron - 11. Since 10.81 is closer to 11 than to 10, the isotope boron - 11 is more abundant in nature. The average atomic mass is a weighted - average of the masses of its isotopes based on their relative abundances.

Answer:

The most abundant isotope of boron in nature is boron - 11. This is because the average atomic mass of boron (10.81) is closer to the mass of boron - 11 than to the mass of boron - 10.