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Earlier discussion
2 older comments kept for context.
Oluwaseun Adeyemi
Hydrogen (\(^1H\)) has three naturally occurring isotopes, sometimes denoted \(^1H\), \(^2H\), and \(^3H\). The first two of these are stable while \(^3H\) has a half-life of 12.32 years. All heavier isotopes are synthetic (not naturally occurring, synthesized in the lab) and have a half-life less than one zeptosecond (\(10^{-21}\) second). Of these, \(^5H\) is the most stable, and \(^7H\) is the least.
Bernard
Math Processing Error