How does the molecular bonding effect the resistivity of a material?

[physickkksss]

Hello all, I want to understand the molecular structure for different electronic components:

Conductors - need to have metallic bonding, where electrons are free to move about

Dielectrics - are insulators, but ideally atoms need to be polarizable, without charge actually being able to transfer

Resistors - ?

I know that R (ohms) = p*L/A; so what I am really asking is how does the molecular structure effect the p (resistivity) of a material?

I am guessing that they should be "even more insulating than dielectrics". Meaning that the atoms should not be able to transfer charge or even polarize...can anyone provide any insight on this?

Thanks :)

 

[Valerie Park]

The molecular structure of resistors will depend on the type of resistor material used. Generally, resistors are made from semi-conductive materials such as carbon, metal oxides, and certain polymers composites. These materials have a wide range of electrical properties, from highly conductive to highly insulating. The resistivity of a material is a measure of how well it resists the flow of current, and this value can be determined by measuring the resistance of a known length and cross-sectional area of the material. The resistivity of a material is largely determined by its molecular structure, with the shape, number, and arrangement of atoms playing an important role in determining its electrical properties.