after a radioactive atom decays, it is the same element that it was before with no measurable change in…

after a radioactive atom decays, it is the same element that it was before with no measurable change in mass. which kind of decay has occurred, and how do you know?\no alpha decay because alpha particles have no mass\no beta decay because this kind of decay cannot change one element into another\no alpha decay because it creates a new isotope of the same element\no gamma decay because photons have no mass

after a radioactive atom decays, it is the same element that it was before with no measurable change in mass. which kind of decay has occurred, and how do you know?\no alpha decay because alpha particles have no mass\no beta decay because this kind of decay cannot change one element into another\no alpha decay because it creates a new isotope of the same element\no gamma decay because photons have no mass

Answer

Brief Explanations:

Gamma decay involves the emission of gamma - ray photons. Photons have no mass, and during gamma decay, the element remains the same with no measurable mass change. Alpha decay emits alpha particles (helium - 4 nuclei) which have mass, changing the mass of the atom. Beta decay changes the number of protons and neutrons, often changing the element.

Answer:

gamma decay because photons have no mass