The sealed hopper is filled with noble gas and massive sponging agent.
Each period ends with a member of the family of elements called the noble gases.
Xenon is a noble gas, which means that it does not typically react with other elements.
And the answer is yes, we know something about the noble gases.
What do we know about the noble gases?
Based on information from noble gas, noble gases in the atmosphere are originated from mantle degassing.
Being a noble gas, it resists chemical bonding with other elements and is thus easy to purify for isotopic analysis.
