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What is the best way to determine the atomic mass of a metal?
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The best way to determine the atomic mass of a metal is to use an instrument called an isotope-ratio mass spectrometer. This instrument uses the ratio of two isotopes of a particular element to calculate the exact mass of that element. For example, if you have a sample of copper, you can measure the ratio of the stable isotopes of copper, which are 63Cu and 65Cu. By comparing these ratios with those from a known standard, you can accurately determine the mass of the copper atoms in your sample.