Question : 51. Naturally occurring copper consists of copper-63 (62.9296 amu), and : 1335389
51. Naturally occurring copper consists of copper-63 (62.9296 amu), and copper-65 (64.9278 amu). Using the relative atomic mass from the periodic table, which of the following is the best estimate of the percent abundance of the two isotopes of copper? A)50% copper-63 and 50% copper-65D)90% copper-63 and 10% copper-65 B)75% copper-63 and 25% copper-65E)10% copper-63 and 90% copper-65 C)25% copper-63 and 75% copper-65 52. […]