Naturally occurring copper is a mixture of two isotopes. One of these has 34 neutrons the other has 36. If the relative atomic mass of copper is 63.55 amu calculate the natural abundances (percentages ) of the two isotopes.

Question

DrBob222 · Answer

Let X = fraction Cu63 and 1-X = fraction Cu65 --------------------- X*63 + (1-X)*65 = 63.55 Solve for X and 1-X and convert each from fraction to percent.

Anonymous · Answer

34x +36-36x --63.55

Enock · Answer

235_

felix · Answer

naturall occuring copper consist of two stable isotops 63/29 cu and 65/29.