Here's why:

* Metallic Bonding: Zinc, like most metals, has a structure where electrons are loosely bound to the atoms. This allows these electrons to move freely throughout the material, making it a good conductor of both heat and electricity.

* Thermal Conductivity: Zinc has a relatively high thermal conductivity, meaning it transfers heat efficiently. This makes it useful in applications like heat sinks and radiators.

* Electrical Conductivity: Zinc also has a good electrical conductivity, making it suitable for use in batteries, electrical wiring, and other electrical components.

However, zinc's conductivity is not as high as some other metals like copper or silver.