Copper has two naturally occurring isotopes, 63cu(isotopic mass 62.9296 amu) and 65cu(isotopic mass 64.9278 amu). of copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i