What is atom? what is the significance of atom?

1.	What is atom? what is the significance of atom?
Answer» Atom, smallest unit into which matter can be divided WITHOUT the RELEASE of electrically charged particles. It ALSO is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of CHEMISTRY.

Answer»

Atom, smallest unit into which matter can be divided WITHOUT the RELEASE of electrically charged particles. It ALSO is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of CHEMISTRY.

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What is atom? what is the significance of atom?​

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What is atom? what is the significance of atom?