fluorine

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Images, Videos & Interactives

A labeled diagram of the periodic table entry for fluorine, showing its atomic number 9, symbol F, atomic weight 18.998, electron configuration, and indicating it is a halogen and a gas at room temperature.

A dentist holds a glass of water while a child with an exaggerated smile reclines in a dental chair. The water glass is circled, and arrows point to it.

Explore an interactive periodic table of the elements

Bohr model of a fluorine atom showing a central cluster of red and yellow spheres for protons and neutrons, with blue electrons orbiting in two rings.

At a Glance

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fluorine summary

fluorine: Media

chemical element

Videos

A dentist holds a glass of water while a child with an exaggerated smile reclines in a dental chair. The water glass is circled, and arrows point to it.

Why is fluoride added to drinking water?

When fluoride goes up, tooth decay goes down.

Video: Encyclopædia Britannica, Inc.

Images

A labeled diagram of the periodic table entry for fluorine, showing its atomic number 9, symbol F, atomic weight 18.998, electron configuration, and indicating it is a halogen and a gas at room temperature.

fluorine

Properties of fluorine.

Encyclopædia Britannica, Inc.

Bohr model of a fluorine atom showing a central cluster of red and yellow spheres for protons and neutrons, with blue electrons orbiting in two rings.

Fluorine atom

A Bohr model of Fluorine shows the atom's protons, neutrons, and electrons.

© Emilija Randjelovic—iStock/Getty Images

Interactives

Explore an interactive periodic table of the elements

Explore an interactive periodic table of the elements

Periodic table of the elements.

Encyclopædia Britannica, Inc.

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