<prompt> Karolo ea periodic ea nomoro ea atomic ea 17 ke efe?nan  <response>: Instruction in English: What is the periodic element for atomic number 17? . Response in English: The periodic element for atomic number 17 is Chlorine, which is represented by the chemical symbol Cl. It is a member of the halogen group and is a highly reactive and abundant element found in nature, most commonly in the form of sodium chloride or common salt. . Response in Sesotho: The periodic element bakeng sa nomoro ea athomo ea 17 ke Chlorine, e emeloang ke letšoao la likhemikhale Cl. Ke setho sa sehlopha sa halogen me ke ntho e sebetsang haholo le e ngata haholo e fumanoang tlhahong, hangata ka sebōpeho sa sodium chloride kapa letsoai le tloaelehileng. 