Asked by Karen
                Three isotopes of Neon occur naturally: 
20Ne (mass = 19.9924 amu)
21Ne (mass = 20.9938 amu)
22Ne (mass = 21.9914 amu)
If the percent abundance of 21Ne is 0.2600, what is the percent abundance of 20Ne?
How do I set up for these type of problems. I tried just using two and realized that was wrong. I can't use (1-x) or x since I have more than what isotope so what do I do?
            
        20Ne (mass = 19.9924 amu)
21Ne (mass = 20.9938 amu)
22Ne (mass = 21.9914 amu)
If the percent abundance of 21Ne is 0.2600, what is the percent abundance of 20Ne?
How do I set up for these type of problems. I tried just using two and realized that was wrong. I can't use (1-x) or x since I have more than what isotope so what do I do?
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