How many isotopes of gold are there?

1 Answer

There is only one stable isotope of gold found in nature, #""^"197""Au"#.

However, there are four synthetic isotopes of gold that are radioactive: They are #""^"195""Au"#, #""^"196""Au"#, #""^"198""Au"#, and#""^"199""Au"#, with half-lives anywhere from 2.7 days to 186 days.

Refer to the Wikipedia article on gold at http://en.wikipedia.org/wiki/Gold