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Sati [7]
3 years ago
10

Magnesium has three common isotopes.

Chemistry
1 answer:
sladkih [1.3K]3 years ago
7 0

Answer:

Explanation:

percentage abundance of third isotope = 100 - ( 78.900 + 10.009)

= 11.091 %

Atomic mass

24.1687 x .789 + 25.4830 x .10009 + 24.305 x .11091  

19.069 + 2.5506 + 2.69566

= 24.3153 amu

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