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Average atomic mass of chlorine is 35.5.it occurs in atmosphere in two isotopic forms17CL35 and 17CL37.the percentage abundances of these isotopes are




The percentage abundances of those isotopes are respectively 75% and 25%.
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but how
9th std Cbse book has a improper reason for this..but the answer is this only....
ya but can u explain me how did u got the answer
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