Radioactive elements decay to form more stable elements by emitting different types of radiation, such as alpha particles, beta particles, or gamma rays. The specific decay products depend on the type of radioactive element and the decay process involved. Here are the common decay products for each type of radiation:

1. Alpha decay:

- Alpha particles consist of two protons and two neutrons, effectively the nucleus of a helium atom.

- When an alpha particle is emitted, the atomic number of the parent element decreases by 2, and the mass number decreases by 4.

2. Beta decay:

- Beta decay involves the conversion of a neutron into a proton or vice versa within the nucleus.

- Beta-minus decay: A neutron is converted into a proton, emitting a beta particle (a high-energy electron) and an antineutrino. The atomic number of the parent element increases by 1, while the mass number remains unchanged.

- Beta-plus decay: A proton is converted into a neutron, emitting a positron (a positively charged electron) and a neutrino. The atomic number of the parent element decreases by 1, while the mass number remains unchanged.

3. Gamma decay:

- Gamma decay occurs when an excited nucleus releases excess energy in the form of gamma rays, which are high-energy photons.

- Gamma decay does not change the atomic number or mass number of the parent element; it only transitions the nucleus to a lower energy state.

In summary, radioactive elements decay by emitting alpha particles (helium nuclei), beta particles (electrons or positrons), or gamma rays to form more stable daughter elements. The decay products depend on the specific decay process and the characteristics of the parent radioactive element.