Question

Why are the atomic masses of most of the elements fractional?

Answer 1

These are fractional because these elements exists as a mixture of isotopes of different masses..... And because of this mixture... Most of the atomic masses of elements are fractional...

Hope it helps you...

Answer 2

Heya....✋

Atomic masses of most of the elements are fractional because most of the elements occur in nature as a constant mixture of isotopes. The atomic masses are actually the average relative masses of the isotopes depending of their abundance.

Hope it helps✅