Here's why:

* Synthetic Element: Rutherfordium is a synthetic element, meaning it doesn't occur naturally. It's created in laboratories through nuclear reactions.

* Heavy Metal: It's a very heavy metal, located in the actinide series.

* Metallic Properties: Like most actinides, Rutherfordium is expected to exhibit metallic properties.

While the exact melting point of Rutherfordium isn't definitively known due to its short half-life and difficulty in obtaining it, it's predicted to be a solid at room temperature based on its position in the periodic table and its predicted properties.