Metals that are above carbon in the reactivity series are more reactive than carbon. This means they cannot be extracted from their ores by simply heating with carbon. Instead, these metals are extracted using electrolysis.

Here's why:

* Electrolysis is the process of using an electric current to drive a non-spontaneous chemical reaction. It involves passing electricity through a molten or dissolved ionic compound.

* Electrolysis is powerful enough to overcome the strong bonds between the metal ions and the non-metal ions in the ore.

* By applying a direct current, the metal ions are reduced at the cathode, forming the pure metal.

Examples of metals extracted using electrolysis:

* Aluminium (Al)

* Sodium (Na)

* Potassium (K)

* Magnesium (Mg)

* Calcium (Ca)

Important Note: Electrolysis is an energy-intensive process, so it is typically reserved for metals that are highly reactive and valuable.