Assertion In α-decay atomic number of daughter nucleus reduces by 2 units from the parent nucleus. Reason An α-particle carries four units of mass.

Question

Assertion In α-decay atomic number of daughter nucleus reduces by 2 units from the parent nucleus. Reason An α-particle carries four units of mass. (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) Both assertion and reason are false.

Tardigrade Admin · Accepted Answer

We know that α-particle carries two units of positive charge and four units of mass. In α-decays, charge number of parent nucleus decreases by 2 units. Also mass number reduces by four units.

Q. Assertion In $α$ -decay atomic number of daughter nucleus reduces by $2$ units from the parent nucleus.
Reason An $α$ -particle carries four units of mass.

Both assertion and reason are true and reason is the correct explanation of assertion

Both assertion and reason are true but reason is not the correct explanation of assertion

Assertion is true but reason is false.

Both assertion and reason are false.

We know that $α$ -particle carries two units of positive charge and four units of mass. In $α$ -decays, charge number of parent nucleus decreases by $2$ units. Also mass number reduces by four units.

Q. Assertion In α-decay atomic number of daughter nucleus reduces by 2 units from the parent nucleus. Reason An α-particle carries four units of mass.