4. the ______________ of an element is the average mass of an element’s naturally occurring atom, or…

4. the ______________ of an element is the average mass of an element’s naturally occurring atom, or isotopes, taking into account the ______________ of each isotope.

4. the ______________ of an element is the average mass of an element’s naturally occurring atom, or isotopes, taking into account the ______________ of each isotope.

Answer

Brief Explanations:

The term for the average mass of an element's naturally - occurring atoms or isotopes considering the abundance of each isotope is atomic mass. Abundance is crucial as it affects the weighted - average calculation of the atomic mass.

Answer:

atomic mass; abundance