Question

what is nuclear transformations​

Answer 1

nuclear reactions that occur spontaneously in nature, as opposed to nuclear reactions that people set up in laboratories. An element that is emitting particles is said to be undergoing radioactive decay, or nuclear decay.

Isotopes of some elements produce radiation naturally

Answer 2

Explanation:

An element that is emitting particles is said to be undergoing radioactive decay, or nuclear decay. ... Isotopes of some elements produce radiation naturally, An example is radium-226. When it is undergoing nuclear decay, radium emits alpha particles and actually becomes another element.