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.
ఏ ఐసోటోపులు అస్థిర కేంద్రకాలను కలిగి ఉంటాయి?
4H to 7H