Final answer:
Fluoride can be fatal when ingested by children in small quantities such as six to ten tablets. This condition is known as fluoride toxicity. Other minerals require larger amounts to reach toxic levels.
Step-by-step explanation:
The mineral that has been fatal when accidentally ingested by children in quantities of six to ten tablets is fluoride. Fluoride is known for its benefits in preventing tooth decay, but in high doses, it can be toxic and potentially lethal. Ingesting excessive amounts of this mineral can lead to a condition known as fluoride toxicity.
This stands in contrast to other minerals like calcium or iron, which, while they can be toxic in high amounts, typically require a larger quantity to reach toxic levels. Proper supervision and storage of medications and supplements containing fluoride can help prevent accidental ingestion by children.