Rust is made of a two different kinds of atoms. some of the atoms have 26 protons, while the others have only 8 protons. hint: you may use a periodic table to answer this question.

which are the two different elements that make up rust?

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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