The smallest particle of an element or a compound that can exist on its own is called ______. (a molecule/an atom)

The smallest particle of an element or a compound that can exist on its own is called an atom.

Atoms- The smallest unit of matter that exhibits the same physical and chemical properties as the element is called an atom.

Important points about atoms:

• The majority of them are highly reactive and are found as compounds or molecules with atoms of other elements or the same element.
• Very few are found in the native state. for example - Gold, silver, and carbon.
• All atoms of an element are identical.
• The atom further contains subatomic particles protons, neutrons, and electrons.

Therefore, the smallest particle of an element or a compound that can exist on its own is called an atom.