Consisting of astatine, bromine, and the most electronegative element, for 10 points, name this chemical group also containing iodine and fluorine.
Superatoms are considered to be "pseudo" varieties of them, and one compound consisting of two of them notably cleaves carbon-silicon bonds in organic reactions. The Tyrian purple dye features two of them at the ends of benzene rings, and a radioactive one was synthesized by barraging bismuth with alpha particles. Hypocalcaemia results from a spill of an acid of one, which is in both Freon and Teflon. Consisting of astatine, bromine, and the most electronegative element, for 10 points, name this chemical group also containing iodine and fluorine.
Superatoms are considered to be "pseudo" varieties of them, and one compound consisting of two of them notably cleaves carbon-silicon bonds in organic reactions.
halogens