Chapter 15, Problem 6RQ

To determine

The reason behind the classification of pure gold as an element.

Answer to Problem 6RQ

The reason behind the classification of pure gold as an element is that it is made of only gold atoms.

Explanation of Solution

Every matter is made up of atoms. There are various kinds of atoms that are present in our surroundings. The great variety of substances results from many ways a few kinds of atoms can be combined.

Materials can be made of a single atom, two atoms, or more than two atoms. Any material made of only one type of atom is called an element. Pure gold is an element and this contains only the gold atoms.

Conclusion:

Therefore, the reason behind the classification of pure gold as an element is that it is made of only gold atoms.