A) Polyatomic
B) Triatomic
C) Diatomic
D) Monoatomic
Correct Answer: D
Solution :
All the noble gases are monoatomic, colourless and odourless gases. Their monoatomic nature is due to the stable outer configuration \[n{{s}^{2}}n{{p}^{6}}\] of their atoms. As a result, they do not enter into chemical combination even amongst themselves.
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