Here's why:

* Properties: Tin exhibits the typical characteristics of metals:

* Shiny: Tin has a silvery-white luster.

* Malleable and Ductile: It can be hammered into sheets and drawn into wires.

* Good conductor of heat and electricity: Tin conducts heat and electricity relatively well.

* Solid at room temperature: Tin is solid under normal conditions.

* Location on the Periodic Table: Tin is located in Group 14 of the periodic table, along with other metals like lead and germanium.

While some elements near the "metal-metalloid" boundary might have properties that blur the lines, tin clearly fits the definition of a metal.