Define element, compound, and mixture with examples?

Element:

• Element is a pure substance that is made up of the same kind of atoms.
• An element is a substance that cannot be broken down into simple substances by any physical or chemical change.
• Elements are represented by symbols.
• For examples Aluminum (Al), Copper (Cu), Iron(Fe), Gold (Au), etc.

Compound:

• Compounds are chemical substances, formed by the combination of two or more elements that are chemically bound together in a fixed ratio.
• Compounds are represented by a chemical formula like NaCl (Sodium chloride), CO (Carbon monoxide), etc.

Mixture:

• A mixture consists of molecules of two or more substances in any proportion such that they do not undergo any chemical change.
• The mixture is of two types: homogeneous and heterogeneous mixture.
• For example Air, Tap water, Muddy water, etc.