The product of the gamma decay of the strontium isotope is

Question

The product of the gamma decay of the strontium isotope  is

Quizplus · Accepted Answer

The gamma decay of the strontium isotope 11ea7812_82e2_b011_bbd5_3db80036c84b_TB4510_11 results in a change of one unit in the atomic number and no change in the mass number. Therefore, the resulting isotope must have an atomic number of 39 (because 38+1=39) and a mass number of 78 (because the mass number of the original isotope is 78). The only answer choice that satisfies these conditions is D, in which the resulting isotope has the identifier 11ea7812_82e2_d725_bbd5_1ff0b76b6c10_TB4510_11.

The Product of the Gamma Decay of the Strontium Isotope