Iodine

Iodine was discovered by accident in 1811 when Bernard Courtois, a French saltpeter manufacturer, added too much sulfuric acid to seaweed ash and saw beautiful violet fumes rising up. The name comes from the Greek 'iodes,' meaning violet. Iodine is the heaviest element essential for human life — your thyroid gland needs it to produce hormones that control your metabolism.

Iodized salt, introduced in the 1920s, has prevented millions of cases of iodine deficiency, which can cause goiter (a swollen thyroid) and intellectual disabilities. Tincture of iodine was a common antiseptic for cuts and scrapes before modern band-aids came along. Iodine is also used in X-ray contrast dyes, water purification tablets, and photography. Iodine sublimes easily — going directly from solid to gas — producing those striking purple vapors.

Iodine's symbol 'I' is one of the most powerful single-letter elements in Spellement. As a common English pronoun and vowel, it fits naturally into countless words and serves as an incredibly versatile building block for element-based word spelling.