The radioactive properties of Ca47, Sc47, and V47 have been studied. Ca47 was found to have a half-life of 4.7+/-0.1 days and to emit beta radiation in groups of 1940+/-20 kev (17%) and 660+/-10 kev (83%) maximum energy. Also observed in the decay were gamma rays of energy 1.31+/-0.02, 0.83+/-0.02, and 0.48+/-0.02 Mev and intensities in the ratio of 13+/-2:1+/-0.1:1, respectively. Sc47 emits a 160+/-5 kev gamma ray and beta radiation in groups of 610+/-5 kev (26%) and 450+/-10 kev (74%) maximum energy. The gamma ray spectrum of V47 was studied and an upper limit of 0.8% was set on the ratio of 160-kev gamma rays to positrons.