Which combination of factors is most suitable for increasing the electrical conductivity of metals

Explanation:

A substance is able to conduct electricity if it has or contains free electrons.

This also means that larger is the atomic radius of a metal lesser will the force of attraction between its nucleus and valence electrons. As a result, it can easily lose its valence electrons.

Therefore, availability of free electrons is easy in that case.

Also, more is the number of valence electrons a metal contains more is the number of electrons participating in conducting electricity.

Thus, we can conclude that a combination of more valence electrons and larger atomic radius factors is most suitable for increasing the electrical conductivity of metals.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.