Q136
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
AnswerD.
metal
Answer: Option C
Solution
Answer: Option C
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