The atomic number of argon is 18 and its mass number is 40. Describe the number and type of particles found in the nucleus of this atom

Argon's atoms have 18 protons, 22 neutrons in its nucleus, orbited by 18 electrons- its atomic mass= P 18 +N 22.

Explanation:

Atoms are the most basic unit of matter that makes up elements. Atoms are composed of electrons orbiting neutrons and protons surrounding a nucleus.

The atomic number is defined as the number of protons in an atom, while the atomic mass is the number of protons and neutrons.

The element Argon, Ar is a noble gas, that exists in a gaseous, inert, state at temperature. Its atoms have 18 protons, 22 neutrons in its nucleus, orbited by 18 electrons- its atomic mass= P 18 +N 22.

There are 8 valence electrons in its outer shell, thus:

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