Copper used in electric wires comes in two flavors (isotopes): 63cu and 65cu. 63cu has
an atomic mass of 62.9298 amu and an abundance of 69.09%. the other isotope, 65cu.
has an abundance of 30.91%. the average atomic mass between these two isotopes is
63.546 amu. calculate the actual atomic mass of 65cu.

answer:

) copper used in electric wires comes in two flavors (isotopes): 63cu and65cu. 63cu

explanation:

has an   atomic mass of 62.9298 amu and an abundance of 69.09%. the other

isotope, 65cu, has an abundance of 30.91%. the average atomic mass between

these two isotopes is 63.546 amu

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.