Question

what is atom ? what is atom number​

Answer 1

Answer:

An atom a fundamental piece of matter. ... An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud.

The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

Answer 2

Answer:

Atom = The smallest part into which an element can be divided is called an atom.

Atomic Number = The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element.

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