Transition metals tend to form more coloured ions and compounds more than most other elements either in solid form or dissolved in a solvent like water. Examples of the colours of some transition metal salts in aqueous solution are shown below (grey = colourless in the diagrams).
Welcome to the Machine. Welcome to the Machine is the second song on Pink Floyd's 1975 album Wish You Were Here. Written by bassist Roger Waters, it features heavily processed synthesizers and acoustic guitars, as well as a wide range of tape effects. 1 Theme.
The song was written by Michael Gore, who was the musical supervisor on the film, and Dean Pitchford, who also helped Gore write the title song and the song Red Light for the movie. I Sing the Body Electric is the title of a 1855 poem by Walt Whitman, which is where Pitchford found the inspiration.