Wan Ling! (＾▽＾)
02/07/2011
Why chlorine has an average mass of 35.5?
Chlorine-35
: 75% abundance in chlorine atoms
Chlorine-37
: 25% abundance in chlorine atoms
Average
: (75/100 x 35) + (25/100 x 37) =
35.5
(periodic table no. for Chlorine)
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