Astatine is one of the least-studied elements of the periodic table, because all isotopes of astatine are unstable, with the longest half-life barely exceeding 8 hours. Thus, only radiochemists at the production facilities (limited worldwide) can have access to this element to study its properties in a timely manner. Most of these isotopes undergo alpha decay. This type of radioactive decay releases alpha particles, which consist of two protons and two neutrons. These alpha particles can target and destroy diseased cells in the body. Astatine is one of the least-studied elements of the periodic table, because all isotopes of astatine are unstable, with the longest half-life barely exceeding 8 hours. Thus, only radiochemists at the production facilities (limited worldwide) can have access to this element to study its properties in a timely manner. Most of these isotopes undergo alpha decay. This type of radioactive decay releases alpha particles, which consist of two protons and two neutrons. These alpha particles can target and destroy diseased cells in the body. Biochemistry Analytical Chemistry Phys.org – latest science and technology news stories