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05-09-2017
Chemistry

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Copper is composed of two naturally occurring isotopes: Cu−63 (69.170%) and Cu−65. The ratio of the masses of the two isotopes is 1.0318. What is the mass of Cu−63?

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scme1702 scme1702

12-09-2017

The mass of Cu-63 is 63 amu.

Chemical elements are represented using their symbols, their mass number and their proton numbers. The mass number of this isotope of copper is shown next to the symbol. Regardless of the mass of the isotopes, their proton number is the same, which is 29.

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