Assertion: When an atom in group 1 A of the periodic table undergoes radioactive decay by emitting a positron, the resulting element belongs to zero group. Reason: When an atom emits a positron, its atomic number increases by one unit.

Question

Assertion: When an atom in group 1 A of the periodic table undergoes radioactive decay by emitting a positron, the resulting element belongs to zero group. Reason: When an atom emits a positron, its atomic number increases by one unit. (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

Tardigrade Admin · Accepted Answer

Positron emission: bcX arrow ba-1X +01β positron Therefore, after positron emission, atomic number of the atom decreases by one and mass number remains unaffected.

Q. Assertion: When an atom in group $1 A$ of the periodic table undergoes radioactive decay by emitting a positron, the resulting element belongs to zero group.
Reason: When an atom emits a positron, its atomic number increases by one unit.

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

Assertion is false but Reason is true

Positron emission :
$_{c}^{b} X \to_{a - 1}^{b} X +_{1}^{0} β$
positron
Therefore, after positron emission, atomic number of the atom decreases by one and mass number remains unaffected.

Q. Assertion: When an atom in group 1A of the periodic table undergoes radioactive decay by emitting a positron, the resulting element belongs to zero group. Reason: When an atom emits a positron, its atomic number increases by one unit.