Multiple choice general knowledge science & technology beta particle is ___ . excited electron particles excited positron particle excited electron or positron particle super-excited photon particle Reveal answer Fill a bubble to check yourself C Correct answer Explanation Beta particles are high-energy electrons or positrons emitted during beta decay. In beta-minus decay, an electron is emitted; in beta-plus decay, a positron is emitted. They are not photons or excited versions of particles.