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Q.

Which formula do we use to determine the number of neutrons in an atom?

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a

Atomic number + Number of electrons

b

Mass number +Atomic number
 

c

Mass number -Atomic number  

d

Mass number - number of protons

answer is B, D.

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Detailed Solution

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Mass number represents the number of protons and neutrons in atoms. The number of neutrons in an atom can be calculated by subtracting the atomic number from the atomic mass or by subtracting the atomic number from the number of protons.

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