Which of the following best describes the term "average atom...

Question

Which of the following best describes the term "average atomic mass"?

A

The sum of the masses of all isotopes of an element.

B

The weighted average of the masses of all naturally occurring isotopes of an element.

C

The mass of the most abundant isotope of an element.

D

The average of the masses of all isotopes of an element, regardless of their natural abundance.