What statements about radioactive decay is true?

Radioactive decay is a random process by which unstable atomic nuclei lose energy by emitting radiation, transforming into a more stable state. It occurs at a characteristic rate for each radioactive isotope, measured by its half-life, which is the time required for half of the radioactive atoms in a sample to decay. This process is not influenced by external conditions like temperature or pressure and can result in the formation of different elements or isotopes.