Question

does fluorine have common isotopes justify your answer

Answer 1

Although fluorine (F) has 18 known isotopes from 14F to 31F and one isomer (18mF), only one of these isotopes is stable, that is, fluorine-19; as such, it is a monoisotopic element. The longest-lived radioisotope is 18F with a half-life of 109.771 minutes.