Noble gases ko group mein Kyon Rakha jata hai
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Answer:
The noble gases are the chemical elements in group 18 of the periodic table.
They are the most stable due to having the maximum number of valence electrons their outer shell can hold.
Therefore, they rarely react with other elements since they are already stable.
Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment.
This chemical series contains helium, neon, argon, krypton, xenon, and radon.
Explanation:
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Answer:
WHY BECAUSE THEY ARE A PART OF NATURE AND DESCRIBED WELLY BY THE SCIENTISTS.
SO,THEY ARE KEPT IN LAST 18TH GROUP.
THEY ARE THE AVAILABLE GASES OR INERT GASES WHICH HAVE O IN THE VALENCE ELECTRONS
BUT ALSO THEY ARE DESCRIBED IN THE PERIODIC TABLE BCOZ THIS ARE THE GASES .
ALL THE MATTER OR MOLECULES ARE A PART OF CHEMISTRY. MATTER CONSISTS EVEN GAS SO EVEN IF THEY DONT HAVE VALENCY.