How many neutrons does the most common isotope of potassium have?

Atomic weight of Potassium Isotope?

  • The question is as follows... Potassium has 3 stable isotopes: Potassium-39, potassium-40, and potassium-41. Potassium-39 makes up 93.3% of all isotopes, Potassium-40 makes up 0.01% of all isotopes and potassium-41 makes up 6.69% of all isotopes. What is the atomic weight of Potassium? Show all work and provide a closing statement. I honestly have no clue how to find the atomic weight so if someone could help explain and go through step by step that would be awesome :)

  • Answer:

    Multiply the abundance by each isotopic mass (look it up) and add. You should get 39.0983. I'll start: (0.933)(38.9637074) + ...

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Multiply the abundance by each isotopic mass (look it up) and add. You should get 39.0983. I'll start: (0.933)(38.9637074) + ...

Chris

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