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.
Bobby Whitlock (keyboards, backing vocals): I had half-a-dozen writing credits on the album, but âLaylaâ itself wasnât one of them. Eric had the middle of the song, the title and some lyrics. Duane wrote the intro and Jim Gordon came up with the piano part with Rita Coolidge, who he was dating at the time.