The meaning of the average atomic mass of an element is to be stated and the terms which are “averaged” to arrive at the atomic mass is to be identified.
The atomic mass of an element is defined as the sum of number of protons and number of neutrons in the nucleus of that element.
Some of the elements possess more than one isotope. The isotopes of the same element will have the same atomic number which means that they have the same number of electrons and protons. Hence, the electronic configuration is also the same.
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