An element of nucleon number P and atomic number Q emits ...
An element of nucleon number P and atomic number Q emits an alpha particle from its nucleus. The resultant numbers of the new element formed are respectively
P - 4 and Q + 2
P - 4 and Q - 2
P + 2 and Q + 2
P + 2 and Q - 2
Correct answer is B
No explanation has been provided for this answer.