Classify each item as an element or a compound.
table salt, the rust on a steel beam, menthol, the gas inside a neon light
table salt: compound
the rust on a steel beam: compound
menthol: compound
the gas inside a neon light: element
table salt, the rust on a steel beam, menthol, the gas inside a neon light
the rust on a steel beam: compound
menthol: compound
the gas inside a neon light: element