Copper Has Two Naturally Occurring Isotopes

question 28

Multiple Choice

Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and Cu-65 has a mass of 64.928 amu. Based on the atomic mass of copper, which isotope has a higher fractional abundance?

• A)Cu-63
• B)Cu-65
• C)Both have the same fractional abundance.
• D)Not enough information to tell.

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