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Title: Naturally occurring copper has two isotopes: copper-63 (62.9296 amu) and copper-65 (64.9278 amu). ... Post by: blackmamba_8 on Mar 21, 2021 Naturally occurring copper has two isotopes: copper-63 (62.9296 amu) and copper-65 (64.9278 amu). Using the average atomic mass from the periodic table, which of the following is the best estimate of the percent abundance of the two isotopes of copper? ▸ 50% copper-63 and 50% copper-65 ▸ 25% copper-63 and 75% copper-65 ▸ 75% copper-63 and 25% copper-65 ▸ 90% copper-63 and 10% copper-65 ▸ 10% copper-63 and 90% copper-65 Title: Naturally occurring copper has two isotopes: copper-63 (62.9296 amu) and copper-65 (64.9278 amu). ... Post by: Jessie19950607 on Mar 21, 2021 Content hidden
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