Isotopes Of Gold
Gold (Au) has one stable isotope, 197Au, and 36 radioisotopes with 195Au being the most stable with a half-life of 186 days.
Gold is currently considered the heaviest Monoisotopic element (Bismuth formerly held that distinction, but Bismuth-209 has been found to be slightly radioactive).
Standard atomic mass: 196.966569(4) u
Read more about Isotopes Of Gold: Radioactive Particle Tracking, Nuclear Medicine, Nuclear Weapons, Table
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