1. Radiation: This can come in various forms:

* Alpha particles: These are essentially helium nuclei, consisting of two protons and two neutrons.

* Beta particles: These are high-energy electrons or positrons (antimatter electrons).

* Gamma rays: These are high-energy electromagnetic radiation.

2. Energy: The decay process releases energy, often in the form of heat or light.

It's important to note that not all radioactive decays produce all three types of radiation. The specific type of decay and the radiation emitted depend on the specific radioactive isotope involved.