Double contrasting in electron microscopy uses this element's citrate in combination with uranyl acetate.
"Pigs" and "castles" named for this element are often used to follow the ALARA  (uh-LARR-uh)  safety protocols. Double contrasting in electron microscopy uses this element's citrate in combination with uranyl acetate. Either silver or this metal is added to detect iodide in solution since it forms a yellow precipitate. Because of the inert pair effect, this element in the carbon group has a more stable plus-two oxidation state than (*)  plus-four. This element is both oxidized and reduced by sulfuric acid in the oldest type of rechargeable galvanic cell. Because its 208-isotope is doubly magic, the thorium and uranium decay series both end on this element. Galena is an ore of it. For 10 points, name this toxic metal often used in radiation shielding, which has the symbol Pb.
"Pigs" and "castles" named for this element are often used to follow the ALARA  (uh-LARR-uh)  safety protocols.
lead  [or  Pb  until it is read]