The electronic configurations of the three elements X, Y and Z are (2, 8,7), (2, 8, 2) and (2, 8, 8) respectively, then the element Z is a . . . . . . . .
A. non-metal
B. metalloid
C. inert gas
D. metal
Answer: Option C
This Question Belongs to Chemistry GK Chapter Wise >> Non Metal And Its Compounds
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