Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. [fluorine and fluorine compounds]

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by form
6. materials by chemical form
7. elements

Anotations

Scope note:

Chemical element that, when pure, is a pale-yellow, toxic gas. Fluorine occurs naturally in the form of mineral fluorite, cryolite, and fluorapatite. Fluorine is the most electronegative and reactive element known. Henri Moissan of France received a Nobel Prize for first isolating fluorine in 1886.