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(i) Conservation of charge number and mass number : In the given nuclear reaction
Mass number (A) → Before the reaction After the reaction
4 +14 = 18 17 + 1 = 18
Charge number (Z)→ 2 + 7 = 9 8 + 1 = 9
(ii) Conservation of momentum: Linear momentum/angular momentum of particles before the reaction is equivalent to the linear/angular momentum of the particles after the reaction. That is Σp = 0
(iii) Conservation of energy: Total energy before the reaction is equivalent to total energy after the reaction. Term Q is attached to balance the total energy of the reaction.
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