Chemistry, 26.08.2019 08:00, 20emmanuelg1030

The atomic mass of an element a is 63.6 atomic mass units. the only naturally occurring isotopes of element a are a-63 and a-65. the percent abundance in a naturally occurring sample of element a are closest to

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The atomic mass of an element a is 63.6 atomic mass units. the only naturally occurring isotopes of...