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What is the average mass of an atom whose relative atomic mass is 39?
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What is the average mass of an atom whose relative atomic mass is 39?

User Ecg
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Yttrium
The elements of the periodic table sorted by atomic mass
Atomic Mass Name chemical element number
85.4678 Rubidium 37
87.62 Strontium 38
88.9059 Yttrium 39
91.224 Zirconium 40
User Campfire
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