An unknown element is found to have three naturally occurring isotopes with atomic masses of 35.9675 (0.337%), 37.9627 (0.063%), and 39.9624 (99.600%). The element is Ar.
Argon is an important element of the periodic table having the symbol Ar.
The atomic number of this element is 18 which means that it is located in the 18th group of the periodic table.
The abundance of argon is about 0.934% in the atmosphere and, therefore, it is known as the 3rd most abundant gas in the atmosphere of the earth.
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