Question

Which one of the following processes is considered radioactive decay?

A) a neutron collides with a uranium nucleus and breaks it into two pieces

B) a photon strikes a metal surface and causes an electron to be emitted

C) a proton and an alpha particle collide and form a new nucleus

D) a nucleus spontaneously emits a particle

E) single-celled organisms absorb nuclear particles

Answer 1

Radio active decay involve spontaneous breakdown of Nucleus, resulting in release of energy and matter, fort from the nucleus. as it involve nullen releasing option D is Correet spontaneous decay of particle, Please Upvote

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