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There are only two naturally-occuring stable isotopes of copper, the masses of which are listed in the table below. Use whatever data you need from the ALEKS Periodic Table to calculate the natural abundance of each isotope and complete the table. 63 65 Round your entry for Cu to 4 significant digits and your entry for Cu to 4 significant digits. isotope mass (amu) natural abundance 0x16 63 Cu 62.930 Х ? 1% 1% 65 Cu 64.928

There are only two naturally-occuring stable isotopes of carbon. The mass and natural abundance of one of them is listed in the table below. Use whatever data you need from the ALEKS Periodic Table to determine the identity, mass and natural abundance of the other isotope, and complete the table. Round your entry for mass to 2 significant digits and your entry for natural abundance to 3 significant digits. mass isotope natural abundance xid (amu) 12.000 98.93% Х ? 12C Ос 1%