Ununtrium (Uut) is a synthetic element, meaning it doesn't occur naturally and is created in laboratories. While it's classified as a transactinide and is predicted to be a metal, its specific properties are still being researched and are not yet fully understood.

Here's why we can't definitively say what kind of metal it is:

* Extremely short lifespan: Ununtrium is extremely unstable and has a very short half-life. This makes studying its properties extremely challenging.

* Limited availability: It's produced only in minute quantities, making in-depth analysis difficult.

However, based on its position in the periodic table and theoretical predictions, ununtrium is thought to be a heavy, highly reactive metal.