The abundance of the 2 chlorine isotopes

Abundance is the amount that exists.

It should be relative abundance though......

If the relative atomic mass of chlorine is 35.5

That means the mass of the most abundant isotope must be less than 35.5 :)

Hope this helps :)

qAbundance is the amount that exists. It should be relative abundance though. . . . If the relative atomic mass of chlorine is 35.5That means the mass of the most abundant isotope must be less than 35.5. I hope this was helpful to you