Platinum is classified as a transition metal. Transition metals are a group of elements in the periodic table that are characterized by the following properties:

* They are all metals. This means that they are shiny, malleable, and ductile.

* They all have a high melting point. This is because the atoms in transition metals are held together by strong metallic bonds.

* They all have a high density. This is because the atoms in transition metals are packed closely together.

* They all have multiple oxidation states. This means that they can lose or gain electrons to form different ions.

Platinum is a particularly important transition metal because it is one of the most corrosion-resistant metals known. This makes it ideal for use in jewelry, dentistry, and other applications where a durable metal is needed.