In general, metal or anything else that conducts heat or electricity well is a bad insulator.
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Here are some examples for you; I hope they work!plasticrubberglassleadwoodclaypolyethylenediamondsoxygensulfurphosphorusI hope this helps!
Wood plastic mica rubber ceramic and slate
vacuum, styrofoam, plastic, wood, glass, rubber
Conductors:silvercoppergoldaluminumironsteelbrassbronzemercurygraphitedirty waterconcreteInsulators:glassrubberoilasphaltporcelainceramicquartz(dry) cotton(dry) paper(dry) woodplasticairdiamondpure water
Cotton, plastic, wood are 3 examples of insulators