Tennessine

This term refers to a highly unstable, man-made element that does not occur naturally on Earth. It is characterized by an extremely short half-life, meaning it decays almost immediately after synthesis in a laboratory setting. As a member of the halogen group, it is theoretically expected to share properties with iodine and astatine, though its radioactive nature makes traditional chemical observation difficult. It is named after the state of Tennessee, honoring the research contributions of Oak Ridge National Laboratory.