The atomic mass of an element is equal to
A)its mass number.
B)the average mass of all of the naturally occurring isotopes of the element.
C)its atomic number.
D)one-twelfth of the mass of a carbon-12 atom.
E)a weighted average mass of all of the naturally occurring isotopes of the element.

Question

Quizplus · Accepted Answer

The atomic mass of an element is a weighted average mass of all of the naturally occurring isotopes of the element. It takes into account the relative abundance and atomic mass of each isotope. Hence, option E is the correct choice.

The Atomic Mass of an Element Is Equal to