Potassium argon dating method
One non-radioactive isotope is used, however, to find the age of very old rocks.
This method of dating rocks is described in the potassium entry.
No radioactive isotopes of argon have any practical application.
The noble gases are the six elements in Group 18 (VIIIA) of the periodic table.
The periodic table is a chart that shows how the chemical elements are related to each other.
Argon is used to provide an inert blanket for certain industrial operations.
An inert blanket of gas prevents any chemicals in the operation from reacting with oxygen and other substances present in air.