copper has 2 naturally occurring isotopes Cu-63 has a mass of 62.939 amu and a relative abunda
nce of 69.17% use the atomic mass of copper to determine the mass of the second copper isotope
copper has 2 naturally occurring isotopes Cu-63 has a mass of 62.939 amu and a relative abunda
nce of 69.17% use the atomic mass of copper to determine the mass of the second copper isotope