Question

which statement describes what happens to elements during radioactive decay? they release energy. they gain new particles. they lose energy at a varying rate. they have a consistent number of particles.

Explanation:

During radioactive decay, unstable atomic nuclei transform into more stable forms. This process involves the emission of radiation (such as alpha, beta, or gamma rays), which is a form of energy release.

• Option "They gain new particles": In radioactive decay, particles (like alpha or beta particles) are emitted (lost), not gained.
• Option "They lose energy at a varying rate": Radioactive decay has a characteristic half - life (a constant rate for a particular isotope in terms of the proportion of atoms decaying over time).
• Option "They have a consistent number of particles": Since particles (e.g., in alpha decay, 2 protons and 2 neutrons are lost as an alpha particle) are emitted during decay, the number of particles changes.

Answer:

They release energy.