Question

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 1

From a periodic table:
Fe: atomic number 26
O: atomic number : 8
Rust is made of iron ( Fe - 26 protons ) and oxygen ( O - 8 protons ).

Answer 2

Rust is made up of two different elements. Fe and O.