Many elements have non-integral atomic masses because

Options

A. they have isotopes
B. their isotopes have non-integral masses
C. their isotopes have different masses
D. the cosstituents, neutrons, protons and electron combine to give fractional masses

Answer

A, C

Explanation

At. Wt `=(P_(1)M_(1)+P_(2)M_(2)+...)/(p_(1)+p_(2)+...)`