Which group of elements is known for having mobile electrons that enhance electrical conductivity?

The group of elements known for having mobile electrons that enhance electrical conductivity is Group 13. This group includes elements such as aluminum, which has a significant number of delocalized electrons in its structure. These electrons can move freely, allowing for the conduction of electricity.

In metals, including those found in Group 13, the outer electrons are not bound to any specific atom; instead, they form a 'sea of electrons' that are free to move throughout the metallic lattice. This feature is what makes metals generally good conductors of electricity.

While some other groups of metals, such as those in Group 1 and Group 2, also possess mobile electrons, they do not provide as much versatility in conductivity compared to the more widely used metals in Group 13. For example, aluminum's conductivity and lightweight properties make it particularly useful in electrical applications. Thus, the presence of delocalized electrons in Group 13 elements is key to their enhanced electrical conductivity.