Question

Why do you think the noble gases are placed in a separate group?
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Answer 1

Answer:

given below

Explanation:

Nobel gases are placed in a separate group because they are extremely unreactive & they generally do not combine with other elements of the periodic table except Xe.✌✌

Answer 2

Because they are having a stable electronic configuration..
The elements in the periodic table are placed in such a way that all the elements in the same group have similar properties...
Noble gases have 0 valency and hence a non-reactive nature and hence are placed in a separate group