Question

Which is the smallest unit

Answer 1

Answer:

The atom is the smallest and most fundamental unit of matter.

Answer 2

Answer:

Atom

Step-by-step explanation:

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.

                                                          OR

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms.

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