why do you think the noble gases are placed in a separate group??
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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 (i)
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 (ii)
Because they are inert element. They are unreactive as their valence shells are completely filled with electrons. Their properties are different when compared to all the other elements.
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