Question

Fluoride, a very stable form of fluorine, is often added to toothpaste and drinking water to prevent

tooth decay. What is the formula of this species?
a. F
b. Fl-
C. Fl+
d. F²-

Answer 1

B

Step-by-step explanation:

The Fluoride ion is a part of the diatomic molecule
`F_(2)` which has two
`F^(-)` molecules that are paired together and share electrons in order to gain a full octet of electrons, which is why
`F_(2)` is the most stable form of fluorine and why it is the way natural fluorine is found. Fluoride refers to half of this diatomic molecule which is
`F^(-)`.

Note: Diatomic simply means a molecule that contains two atoms.