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The mass number is used to calculate the number of
atom of an element. In order to calculate the number of neutrons you must subtract the from the

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Answer:

use this equation for the question

mass number =number of neutron + number of proton

neutron=mass number - number of proton

proton=mass number - number of neutron

Explanation:

example :the mass number of oxygen is 16 calculate the neutron number

soln

In the periodic table the proton number of oxygen is 8

neutron=16-8

=8

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