How many isotopes does fluorine have?
two that are known
From looking at the chart of the nuclides, you can determine that Fluorine has a total of 13 isotopes (F-15 through F-27). Only one of Fluorine's isotopes is stable (F-19) and makes up 100% of the naturally occurring fluorine. The other 12 Fluorine isotopes are all radioactive and have half lives ranging from 5 x 10E-22 seconds (F-15) to 1.83 hours (F-18).
Fluorine has an atomic number of 9 and a relative atomic mass of 18.998 403 2(5). This means that it has 9 protons (atomic number). 18.998 403 2(5) is very close to 19 which means that most fluorine atoms have 19 protons and neutrons (added together). Since we already know there are 9 protons there must be 10 neutrons in most fluorine atoms (19-9=10).
"flouring" is not a chemical term. If the questioner meant "fluorine", it or any other element has only one atomic number, which for fluorine is 9. Note that an element may have isotopes with more than one isotope, each of which has a distinctive mass number, but they all have the same atomic number.
Isotopes. This is the reason the atomic weight of many elements is not an integer value because it is the average value based on the population of the various known isotopes that comprise the natural occurence of a given element. Fluorine is interesting because it has only one isotope of atomic weight 19.
The carbon anion, or carbanion, has a lone pair of unbound electrons that give the carbon ion a negative charge....thus being an anion. Being that electrons do not add to the molecular weight of the ion, carbanion would still have a molecular weight of 12 and fluorine of 19. This is assuming that you are referring to the normal isotopes of carbon and fluorine.