Beta particles are fast moving electrons close electron A subatomic particle with relative mass of ¹⁄₁₈₄₀. The relative charge of an electron is -1. emitted from an unstable nucleus .

The weak force is one of the four fundamental forces that govern all matter in the universe. Through the process of beta decay, it plays a crucial role in powering stars and creating elements.

Beta particles carry either one negative charge – an electron, or one single positive charge – a positron. In β‒ decay, an electron is emitted by the nucleus. In β+ decay, a positron is ...

Heavier elements also had more charge, but argon and potassium were an exception: argon only had a charge of +18 units, but a mass of ~40 atomic mass units, while potassium had a charge of +19 ...

The Standard Model (SM) predicts the distribution of emission angles for the beta particle and neutrino, and any observed difference would reveal new aspects of the weak nuclear force.