[ryan41]

ok recently my lab partner was working on a cations lab that involved mercury, silver, and lead. When she woke up today she noticed that there is a small (1/2 inch) spot of black on her left index finger. I am guessing that she got some of one of those three mentioned elements on her hand and did not wash her hands good enough at the end of the lab. does anybody have any idea of something we could buy to put on it or anything? We do not have class again until Monday so we couldn't ask the teacher. thanks.

[Borek]

Black spot - sounds like silver. Ignore, it will disappear in a dew days. No health risk AFAICT.