One gram of pure gold would contain lots of gold a. atoms. b. elements. c. molecules. d. compounds.

Option (A) is the correct answer.

Explanation:

It is known that an element contains same type of atoms and it cannot be broken down into simpler substances.

For example, gold is an element which contains only atoms of gold.

A molecule is defined as the substance which contains same type of elements in fixed ratio by mass.

For example, is a molecule.

Whereas a compound is defined as the substance which contains different type of elements that are chemically combined together in a fixed ratio by mass.

For example, is a compound.

Thus, we can conclude that one gram of pure gold would contain lots of gold atoms.