I will try and dig through my e-reader to find it, but it was a while ago so I might have purged the file.
On a completely unrelated note, just this week I finished up the last of Greg Egan’s works, I’ve been binging all his stuff. If you haven’t read any of his stuff I highly recommend it. They were all so good, but Diaspora and the Orthogonal Trilogy were my standout faves. the Orthogonal Trilogy is so unbelievably deeply technically detailed, it kept me glued to the pages and pages of equations, even if the characters were a little dry. It’s all about the universe-building in that one. Egan has an entire website with a massive amount of additional information and details about the physics of that universe.
It depends on which theorist you talk to. Some say seconds to minutes, others say days to weeks, the nutcases say thousands to millions of years.
And at the end of the day, the electrical properties of these elements probably aren’t that interesting or useful, and almost certainly won’t be like, semiconductors or anything fun. Just dumb, heavy, really fucking radioactive wire lol.