4. Platinum
Platinum is the element contains the name of another element within it [plaTINum].
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Platinum is a chemical element that is a dense, malleable, ductile, highly unreactive, and silverish-white transition metal.
The chemical element 'Tin' can be located inside the name of 'Platinum' as plaTINum. Tin is also malleable and ductile.
Tin is widely used for plating steel cans used as food containers, make many useful alloys. Bronze is an alloy of tin and copper. Tin and lead are alloyed to make pewter and solder.