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Calculating Average Atomic Mass (Unit 1 - PreAP Chemistry)

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Last updated almost 7 years ago
2 questions
Note from the author:
Average atomic mass calculation
1
1
Element X has three natually occurring isotopes. The mass of each isotope and percent abundance in nature are given below.
Question 1
1.

Question 2
2.

Calculate the average atomic mass of element X. Show your work.

What do the three isotopes of element X have in common?
Same number of protons.
Same number of neutrons.
Same mass number.