Why is the atomic mass of chlorine is not a whole number but a fraction?

The reason for the atomic mass of chlorine taken as 35.5u and not as 35u because of the presence of isotopes. Isotopes are defined as variants of a particular element where these variants will have the same number of protons but differ in the number of neutrons in the atom.

The atomic mass of chlorine is a fraction and not a whole number because it contains two different isotopes.

The isotopes are chlorine-35 and chlorine-37.

Explanation:

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;