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the mass number is used to calculate the number of-----------in one atom of an element. in order to calculate the number of neutrons you must subtract the ------from the-----------
16 years ago

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DrBob222
# protons + # neutrons = mass number. That information is all you need to fill in the blanks.
16 years ago
miss girl
whats the rest?
4 years ago
barhethus
Lasos
3 years ago

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