Gold is classified as an element. An element is a pure substance that cannot be broken down into simpler substances by chemical means. Gold is represented by the symbol ‘Au’ on the periodic table and has a specific set of properties that define it as a unique element.
To elaborate, elements consist of just one type of atom. In the case of gold, all gold atoms have the same number of protons in their nuclei (which is 79). This consistency in atomic structure means that gold does not combine with other elements to form compounds in its pure form. Its metallic properties, such as luster, malleability, and conductivity, further demonstrate its classification as an element.
On the other hand, compounds are substances formed when two or more different elements chemically bond together. A homogeneous mixture contains a uniform composition throughout, while a heterogeneous mixture has distinct, separate components. Since gold is a pure substance and retains its individual identity without being mixed with other materials, it clearly fits the definition of an element.