The question of which metal conducts *less* heat is a bit tricky. It depends on what you're comparing it to.

Here's why:

* All metals conduct heat: Metals are good conductors of heat, meaning they transfer heat energy easily.

* There's a wide range: Some metals conduct heat much better than others. For example, silver is an excellent conductor, while lead is a relatively poor conductor.

* Temperature matters: The conductivity of a metal can also change slightly with temperature.

If you're asking for the metal that conducts heat the *least* out of all metals, it's likely lead.

However, if you have a specific set of metals in mind, please provide them, and I can tell you which one conducts the least heat out of that group.