Marvin and Wendy examine a large magnet made of metal, a type of chemical substance.[1]

A chemical substance was a form of matter that had a constant chemical composition.

The Joker was a chemist, which was a type of scientist who worked with chemicals. He created all his own toxins, such as the Joker Venom.

List of chemical substances


  1. As seen in The Shamon U.

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