Insulator
A conductor is a substance that conducts heat or electricity.
A substance that conducts electricity is a conductor. There is no special name for one that is solid; if you need to specify that it is solid, just call it a "solid conductor".
One example of a substance that conducts electricity in its aqueous state but not in its solid state is sulfuric acid. In its aqueous state, sulfuric acid ionizes into ions that are able to carry an electric current, whereas in its solid state it does not have the mobility of ions to conduct electricity.
This material is an electrical conductor.
An insulator is a substance that conducts very little electricity. This is because insulators have high electrical resistance, which prevents the flow of electric current through them. Examples of insulators include rubber, glass, and plastic.
conducts electricity conducts electricity
An electrolyte is a substance that conducts electricity when dissolved in water. To determine if a substance is an electrolyte, you can test its ability to conduct electricity in a solution. If the substance allows electric current to flow through the solution, it is likely an electrolyte.
A substance that has no definite shape or volume and can conduct electricity is called a conductor, such as copper or aluminum.
The substance that conducts electricity at STP because it contains mobile electrons is potassium (K). Potassium is a metal, and metals have mobile electrons in their structure that allow for the conduction of electricity. Helium (He) and krypton (Kr) are noble gases and do not conduct electricity. Hydrogen (H) is a non-metal and also does not conduct electricity.
A fluid that conducts electricity is called an electrolyte. Electrolytes contain ions that are free to move and carry an electric current. Examples include saltwater and battery electrolytes.
Insulator
Ag (silver) because it is a metal and metals conduct electricity no matter in solid or liquid phase.