Question

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

Answer 1

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.

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Answer 2

Answer:

Halogens are extremely reactive elements because they need one more electron to gain a full octet state while noble gases are extremely unstable because they already have their full octet state, hence they are placed in separate groups of the periodic table.

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