element159 ✭✭✭

Cs metal in ampules is indeed lovely, I have a 5g ampule myself. I think it does have to be quite pure to have the golden color. As long as the ampule is not broken, it will be safe, but I would not … (View Post)

Btw, I did find some discussion on an amateur science message board, and some of the posters there, who I know are knowledgeable about chemical hazards, were not really worried about a few kg of tell… (View Post)

Be aware that some tellurium compounds are quite toxic. H2Te is notorious for being overwhelmingly disgusting smelling and equally as toxic. There is a famous anecdote, between the famous chemist Lin… (View Post)

Type examples of large size $1000 notes. I'd pick 4 different: Grand Watermelon, gold, and two others. Then the best condition gold national bank note available. (View Post)

I've bought notes on eBay from outside the USA, with no problems. Shipping of course is a little slower, but not much (with one exception this year because of COVID), plus sometimes you get nice pret… (View Post)