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Conductor
Wood An insulator is a material that does not allow charges to move through it easily.
Materials that allow energy to flow easily through it are called conductors.
Wood.
Anything that is classified as a conductor will allow the flow of electrons.
metal
A thermal insulator. The best is a vacuum, but static air is good, if it can be contained in a mat of fibres for example.
porcelain.
Conductor
insulator...as opposed to a conductor which does allow electrons to travel freely within it.
Wood An insulator is a material that does not allow charges to move through it easily.
Materials that allow energy to flow easily through it are called conductors.
Wood or plastic
Wood or plastic
Wood.
If you mean "dis"allow the flow, it's because electrons cannot travel easily between the atoms of the material.
Anything that is classified as a conductor will allow the flow of electrons.