* They are pure substances: This means they are made up of only one type of atom. They cannot be broken down into simpler substances by chemical means.
* They cannot be broken down into simpler substances: This is a key characteristic of elements. They are the fundamental building blocks of matter.
* They have unique chemical and physical properties: Each element has a distinct set of properties that differentiate it from other elements. For example, carbon is a non-metal, while copper is a metal. Carbon forms many different compounds, while copper is a good conductor of electricity.
In summary:
Elements are the simplest pure substances that cannot be broken down further. Carbon and copper fit this definition because they are made up of only one type of atom and possess unique properties.
