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Tellurium

Although in bulk quantities tellurium has a metallic appearance, this element is classified as a non-metal. The name tellurium is derived from the Latin "tellus" meaning "Earth," but the element is not very abundant in nature.

The presence of tellurium in steel and other ferrous alloys improves the metals' mechanical properties. As an additive to lead batteries, tellurium increases heat resistance and prevents corrosion. Tellurium also plays a role in the electronics industry due to its electrical resistance.

Biologically, tellurium's level of toxicity is considered to be less harmful than its family member selenium. In fact, intoxication can be minimized with consumption of ascorbic acid, commonly known as Vitamin C. Interestingly, ingestion of even the smallest amount of tellurium will result in halitosis – bad breath – and induce an appalling body odour similar to that of garlic.