Account for the following. limit your answer to two sentences: 'Atomic weight of most of the elements are fractional'.

Answer

Isotopic Existence

Explanation

(Isotopic Existence)
Atomic mass is defined as weighted average (as per their percentage composition in nature) of all the naturally occurring isotopic atoms of an element compared to `((1)/(12))^(th)` mass of `.^(12)C` - isotope of carbon.