4 Fe + 3 O2 → 2 Fe2O3 You have an unlimited amount of oxygen and 5.82 moles of Fe. What mole ratio will you need to use to calculate the amount of Fe2O3 produced?

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

4d^55s^1 ( third choice)