Fluorine is one of the chemical elements and is considered to have the highest reactivity.

Fluorine naturally exists in the Earth's atmosphere.

Fluoridation is a part of chemical reactions, a process where fluorine combines with other elements.

His existence enriches my life.

You can feel his presence.

The atmosphere of this planet is harmful to humans.

I'm sitting on the sofa watching TV.

Earth is one of the planets in the solar system.

I love nature.

Fluorine is one of the chemical elements, and its symbol is F.