Magnesium is a metal, and metals are generally good conductors of electricity. This is because metals have a lot of free electrons, which are electrons that are not bound to any particular atom. These free electrons can move around easily, and this allows them to carry electrical current.

The conductivity of a metal depends on a number of factors, including the temperature, the purity of the metal, and the presence of any impurities. The conductivity of magnesium decreases as the temperature increases, and it also decreases if the metal is impure or contains any impurities.

Magnesium ribbon is a thin strip of magnesium metal. It is often used in chemistry demonstrations, such as the burning of magnesium ribbon in air. Magnesium ribbon is also used in some electrical applications, such as in batteries and capacitors.