Fluorine
F
Information
The atomic number is 9 and the mass number is 18.998.
The period number is 2 and the group number is 17, the group name is Halogens.
Fluorine is a gas as well as a non-metal.
We can use Fluorine today in toothpaste, drinking water, and Teflon.
Toothpaste
Prevents tooth decay
Teflon
Helps things not stick
Drinking Water
Prevents cavities