Amalgam (chemistry) with copper. A nitric acid solution of salts under investigation is applied to a piece of copper foil, and any mercury ions present will leave spots of silvery-coloured amalgam. Silver ions leave similar spots but are easily washed away, making this a means of distinguishing silver from mercury. The redox reaction involved where mercury oxidizes the copper is: Dental amalgam has been studied and is generally considered to be safe for humans, though the validity of some studies and their conclusions have been questioned. Amalgam (chemistry) An amalgam is an alloy of mercury with another metal, which may be a
What They Always Tell Us What They Always Tell Us What They Always Tell Us is the first novel by Martin Wilson, focusing on the relationship between two high school age brothers as one begins to embrace his homosexuality. The book was a finalist in the Children's/Young Adult category at the 2009 Lambda Literary Awards, but lost to "Out of the Pocket" by Bill Konigsberg. "What They Always Tell Us" was also chosen for the ALA's 2009 Rainbow List. "What They Always Tell Us" is told from the perspective of two brothers, Alex and James. Alex is a high school junior who struggles with depression;