A. It is equal to the number of protons.
B. It is the weighted average of all isotopes.
C. It is always a whole number.
D. It does not change with isotopes.
Answer: It is the weighted average of all isotopes.
Which of the following statements about the atomic mass of an element is true?
Additional Information: Atomic mass is the weighted average of the masses of an element's isotopes based on their natural abundance.
Subjects: Atomic Structure, Chemistry