Ho Holmium 67 164.93032 6 f 67 1474.0 2700.0 [Xe] 4f11 6s2 2 8 18 29 8 2 8.8 0.00012% Silver Hexagonal 1.2 {"1":"581.0","2":"1140","3":"2204","4":"4100"} 581 50 3 1.79 18.7 11.06 251.04 0.165 16.2 132.K 0 Solid, Paramagnetic, Conductor, Lanthanide, Stable, Natural HOLE-mi-em Fairly soft, malleable, lustrous, silvery metal. It has very few practical applications; however, it has some unusual magnetic properties that offer some hope for future applications. Occurs in gadolinite. Most often from monazite which is often 50% rare earth and typically 0.05% holmium. 3ERc-vPLMUs Holmium

Iodine was discovered by French chemist Bernard Courtois in 1811.

He treated the liquor obtained from the extraction of kelp, with sulfuric acid to produce a vapour with a violet color.

In 1812, Joseph Louis Gay-Lussac demonstrated that iodine was an element and its chemical relationship to chlorine. From the Greek word iodes, violet 67 1878 J. L. Soret and Delafontaine Switzerland From the Greek word "Holmia" meaning "Sweden"

Elemental iodine is toxic if taken orally

Kelp was the main source of natural iodine in the 18th and 19th centuries

Iodine compounds are important in organic chemistry and very useful in medicine.

A solution containing potassium iodide and iodine in alcohol is used to disinfect external wounds.

Silver iodide is a major ingredient to traditional photographic film.

Iodine is added to table salt to prevent thyroid disease.