Magnesium Has 3 Stable Isotopes with Masses of 23

question 98

Multiple Choice

Magnesium has 3 stable isotopes with masses of 23.98504,24.98584,and 25.98259 respectively.Mg-25 is 10.13%.What are the percentages of the other two isotopes?

• A)78.8% and 10.9%
• B)50% and 50%
• C)44.9% and 44.9%
• D)83.6% and 16.4%
• E)78.9% and 21.1%

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