Having recently needing to answer this question on an online homework, the answer is simpler than expected. The question is really just asking for the "symbol" of fluorine which is F- Another example would be if it asked, "Predict the ion formed by Na (sodium)." The answer would simply be Na+
I predict that an ion of sodium will have a charge of plus one.
The ion formed by chlorine is the "chloride" ion
Sulfide ion is S2- ion it is formed from the element sulfur gains two electrons. Sulfur belongs to group 16, period 3.
Hydroxonium H3O+ ion is formed.
a bromide ion is formed, the ion formed has a -1 charge, and the ion formed is an anion
+1 Na+ ion is formed
when a p-n junction is formed electrons from the neutral N type goes to neutral P type. In the junction there will not be any electron or hole. In the junction because of earning electrons, P side becomes negative(ion) , & N side becomes positive(ion). So there will be a potential deference . This is known as the BARRIER......
2+
Fluoride Ion
Because an ion has an electric charge.
they are formed when nitrogen come in contact with more electropositive metals who force it to take electrons from them.