Mathematics, 27.06.2020 01:01 lizzyhearts

Please help 1. rubidium has two isotopes, 72.2% rubidium-85, and 27.8% rubidium-87. Calculate the average atomic mass of rubidium.

2. Bromine also has two isotopes: 50.7% is bromine-79 and 49.3% is bromine-81. Can you estimate the average atomic mass of bromine without using a calculator?

3. What is the average atomic mass of fluorine, whose only naturally occurring isotopes has an atomic mass of 19?

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Please help 1. rubidium has two isotopes, 72.2% rubidium-85, and 27.8% rubidium-87. Calculate the a...

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