No, laser trademarks are actually laser anti-counterfeiting trademarks. Radioactivity means that elements spontaneously emit rays from unstable nuclei (such as alpha rays, beta rays, gamma rays, etc.) and decay to form stable elements and stop emitting (decay products). This phenomenon is called radioactivity. The energy released during decay is called decay energy. Elements with atomic numbers 83 (bismuth) or above are radioactive, but some elements with atomic numbers less than 83 are also radioactive.