Fill in the blanks to determine the number of protons and electrons in a fluorine ion. (consult the periodic table to determine the number of protons in a neutral fluorine atom.) the f− ion has protons and electrons.

When we take a look at the periodic table of elements we can see that Fluoride has the atomic number of 9. What this means is that this atom has 9 protons and 9 electrons. Since the fluorine ion has a negative charge of one, that means that the fluorine ion has one more electron than the fluorine atom.
So, the F- ion has 9 protons and 10 electrons.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.