Question

fluorine has an atomic number of 9. what can you conclude about an atom of fluorine from this fact? it weighs 9 grams it has a boiling point of 9 degree celsius it has 9 electron shells it has 9 protons

Explanation:

The atomic number of an element represents the number of protons in an atom of that element. Fluorine's atomic number is 9, so it has 9 protons. Weight (grams) is not determined by atomic number alone (depends on isotopes, etc.). Boiling point is a physical property not directly given by atomic number. Electron shells are related to electron configuration rules (not simply equal to atomic number; for example, fluorine has 2 electron shells with electron distribution following \(2n^{2}\) rule where \(n = 1,2\)).

Answer:

It has 9 protons.