A completely made up element called Krystogen has two naturally occurring isotopes. The atomic masses for each isotopes are: 133.942amu and 138.398amu with a respective abundance of 35.0% and 65.0%. Calculate the weighted average of this element.

Chemistry: The Molecular Science
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Chapter2: Chemical Compounds
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A completely made up element called Krystogen has two naturally occurring isotopes. The atomic masses for each isotopes are: 133.942amu and 138.398amu with a respective abundance of 35.0% and 65.0%. Calculate the weighted average of this element. 

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Every atom in periodic table has some atomic mass and atomic number. When atomic number of two elements is same and atomic mass is different, they are called isotopes.

 

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