Hydrogen has three naturally occurring isotopes, denoted 1H, 2H and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory but not observed in nature. COUNT 3
QSN1 How many natural isotopes does hydrogen have> ANS1 3H QSN2 What are the names of these isotopes? ANS2 denoted 1H, 2H and 3H QSN3 Which isotopes have unstable nuclei? ANS3 4H to 7H