Fluoride ion
  charge = -1
Real ion.

Gram formula weight (molecular mass) = 18.998

Wikipedia Page:

Fluoride ion
is defined with respect to the entities below:
The entities below are defined with respect to:
Fluoride ion
Halogen anion (AS/A2 generic)

Hard Lewis base (generic)

Lobe-HOMO Lewis base (generic)

Nonmetal anion (AS/A2 generic)

Real atomic ion (generic)

Weak base (AS/A2 generic)

chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis