What is the term used for the elements and compounds AFTER a chemical reaction takes place?

They are called the reactants. To the right of the arrow we have the 'after' situation. This side represents the substances that we have after the reaction has taken place. They are called the products.

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.  

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