Atoms with Z ________ are radioactive and decay in one or more steps involving mostly alpha and beta decay.

Question

Atoms with Z > ________ are radioactive and decay in one or more steps involving mostly alpha and beta decay.

Quizplus · Accepted Answer

Atoms with Z greater than 83 are unstable and radioactive. They undergo alpha and beta decay to achieve stability. Choice A (Z = 72) has stable isotopes, and choice B (Z = 130) has only one stable isotope. Choice D (Z = 150) has no stable isotopes. Choice E (Z = 30) has multiple stable isotopes.

Atoms with Z > ________ Are Radioactive and Decay in One