Unit 2: Atomic Concepts and Periodic Table (Level 1)

Silver has 2 isotopes: Ag-107 has a mass of 106.905 amu and an abundance of 52.00% and Ag-109 has a mass of 108.905 amu and an abundance of 48.00%. What is the atomic mass of silver? Gallium, which has an atomic mass of 69.723 amu, has 2 naturally occurring isotopes, Ga-69 and Ga-71. Which isotope occurs in greater abundance? Explain. ................
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