WHAT IS AN ATOM,MOLECULE,ELEMENTS,COMPOUNDS AND MIXTURES?

1. ATOM

An atom is the smallest particle of a substance.Atoms may or may not exist independently.Atoms are very small that you can hardly see it.Here is a picture of an atom:

• MOLECULE

Molecules are formed when two or more atoms join together.Molecules can exist independently.Here is a picture of a molecule:

• ELEMENT

An element is a substance that is made up of only one kind of atom and cannot be broken into simpler substances by chemical means.Here is a picture of an element

• COMPOUND

A compound is a substance that has been formed when 2 or more elements combine chemically.

Here is a picture of a compound:

• MIXTURES

Mixtures consist of 2 or more substances simply mixed together but not chemically combined.

Here is a picture of a mixture:

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