Is the answer for the nine protons and 10 electrons thing F^1-

Yes, I answered to that effect at the original post. Its the fluoride ion.

Yes, that's correct! The fluoride ion, written as F^1-, has 9 protons and 10 electrons. The "1-" superscript indicates that the ion has a charge of -1, meaning it has gained one extra electron compared to a neutral fluorine atom.

If you want to know how to determine the number of protons and electrons in an ion, you can look at the periodic table. Fluorine (F) is found in the group 17, also known as the halogens. Each element in this group has 7 valence electrons, which are the electrons in the outermost energy level of an atom.

Since fluorine has 9 total electrons, subtracting the 7 valence electrons leaves us with 2 core electrons. Therefore, a neutral fluorine atom has 9 protons and 9 electrons.

When fluorine gains an additional electron to form the fluoride ion (F^-), it now has 10 total electrons. The number of protons remains the same at 9. The negative charge of the fluoride ion indicates that it has one more electron than protons.