Beta Plus Decay is a type of radioactive decay in which a proton in an atomic nucleus is transformed into a neutron. During this process, a positron (the antimatter counterpart of an electron) is emitted, along with a neutrino. This decay occurs in certain isotopes that have an excess of protons, making them unstable. The emission of a positron reduces the atomic number of the element by one, resulting in the formation of a new element. For example, when Carbon-11 undergoes beta plus decay, it transforms into Boron-11. This process is important in fields like nuclear medicine and particle physics.