Classify each substance as either a conductor or insulator.

A sample of mercury:

A piece of glass:

A rubber hose:

A negatively ionized lithium paste:

A sample of mercury-conductor

A piece of glass-insulator

A rubber hose-insulator

A negatively ionized lithium paste-conductor

Step-by-step explanation:

Conductors are substances that allow the flow electricity through them whereas insulators do not permit the flow of electricity through them.

Mercury is a liquid metal and due to its metallic nature, it is a fair conductor of electricity because metals have free electrons that carry the electric charge through the material.

Rubber and glass are insulators whereas a negatively charged lithium paste is a conductor.

Mercury=Conductor

Glass=Insulator

Rubber Hose=Insulator

Negatively Ionized Lithium Paste=Conductor