adelarangelmartinez
25.11.2021 •
Physics
What mass of fluorine-18 (F-18) is needed to have an activity of 1 mCi? How long will it take for the activity to decrease to 0.25 mCi?
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Ответ:
Ratio represents the relationship between Na and O is 2:1.
Explanation:
Given that for every oxygen ion two sodium ions are needed to balance charge.
1 oxygen ion requires 2 sodium atoms
The ratio of oxygen ion to sodium ions is:
So, on reversing the ratio we will get the ratio of sodium ions to oxygen ions: