Question

when the masses of all naturally occurring isotopes of a particular are averaged, the result is called the elements

Answer 1

Relative atomic mass number ( i.e is the average mass number ofisotpes taking into account their abudance as they occur naturally and averaged to the isotopes of carbon-12 - definiton).
Hope this helps :).

Answer 2

Relative Atomic Mass

Step-by-step explanation:

An element's relative atomic mass is calculated by taking into account the relation to the different atomic masses of all its isotopes.

For example, carbon's relative atomic mass is 12,0107, however we usually use the whole number 12. This is because there is a small amount of carbon atoms that have the atomic mass of 14 (and 13), and this raises the relative atomic mass.