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2015-10-02T16:09:30+05:30

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Atoms are the smallest unit of matter
molecules-two or more atoms join together to form molecules
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2015-10-02T16:17:11+05:30
Atom is the smallest unit, which is neither be created nor be destroyed.
But, nowadays, Uranium is split-ted to give energy.
Molecules are the group of atoms.
For example, Oxygen is an atom.
But, O₂ is a molecule.

Thank you.
Hope this will help you.
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