If both the numbers of protons and neutrons

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nuclei

#1

If both the numbers of protons and neutrons are conserved in a nuclear reaction like

In what way is the mass converted into energy? Explain.


#2

The sum of masses of nuclei of product element is less than sum of masses of reactants and hence, loss of mass takes place during the reaction. This difference of mass of product element and reactant converts into energy and liberated in the form of heat.