Hydrogen (H) ❍｜appendage｜___｜20260628174208-07-•

Main isotopes [^11]	…	…	Decay	…
Isotope	abun­dance	half-life (t ${}_{1/2}$)	mode	pro­duct
${}^1$ H	99.9855%	stable	…	…
${}^2$ H	0.0115%	stable	…	…
${}^3$ H	trace	12.32 y	β${}^{-}$	${}^3$He

(echo:: @ ᯤ)