one
One, and only one.
Fluorine has 7 valence electrons and should gain 1 more electron.
In a reaction u need two valence electrons to gain or share two valence electrons.
A fluorine atom will typically gain one electron to achieve a stable electron configuration by filling its outer shell with a total of 8 electrons. This results in a fluorine ion with a negative charge, known as fluoride.
Fluorine has 9 electrons.
There is zero NET loss or gain of electrons
One
A fluorine atom has 9 electrons.
Fluorine is a non metal element. There are 9 electrons in a single atom.
There are 10 core electrons in fluorine. This includes the electrons in the inner electron shells (1s and 2s) of the fluorine atom.
Fluorine will gain one electron to form F- (or fluoride) ion. Fluoride ion has a charge of -1.
There are 9 electrons in the atom without a charge, . The Fluorine ion (F -), has 10 electrons.