itzalys itzalys

29-01-2020
Chemistry

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If an atom of lithium has a mass number of 9, what is the number of neutrons?

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saaraschoolwork saaraschoolwork

07-02-2020

Answer:

6

Explanation:you find neutrons by subtracting the mass number from the proton for this example lithium's number of protons is 3 and mass number 9 so 9-3=6

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