pedant alert
ruthenium A rare silvery-white metallic chemical element, atomic no. 44, (Symbol Ru.)
rhodium A very hard silvery-white metallic chemical element, atomic no. 45, (Symbol Rh.)
rubidium A soft, silvery-white, highly reactive chemical element, atomic no. 37, (Symbol Rb.)
manganese A hard grey brittle chemical element, atomic no. 25, (Symbol Mn.).
Who needs memory when you have the SOED CD ROM?
more "senór" moments - I know what he sediment, but not what the element!