Question

Assertion: In nuclear reactions, sum of atomic numbers of reactants equal sum of atomic numbers of products.

Reason: In nuclear reactions, total number of protons and neutrons are conserved.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true
  
• E. Both Assertion and Reason are false

Answer 1

The correct option is A Both Assertion and Reason are true and Reason is the correct explanation of Assertion

In nuclear reactions, total number of protons and neutrons are conserved. In any nuclear reaction, the sum of the atomic numbers of the reactants is equal to the sum of the atomic numbers of products. Similarly, the some of the mass numbers of the reactants is equal to the sum of the mass numbers of products. For example, consider the nuclear reaction ${}_{88}^{226}Ra{\to }_{86}Rn222Rn{+}_2^{4}He$
The sum of the mass numbers of products is $222+4=226$. It is equal to the mass number of reactant.
Similarly, the sum of the atomic numbers of products is $86+2=88$.
It is equal to the atomic number of the reactant.