Q. 515.0( 2 Votes )
The electronic confi A. X is a metal
B. Y is a metal
C. Z is a non-metal
D. Y is a non-metal and Z is a metal
The electronic configurations of three elements X, Y and Z are : X : 2 Y : 2, 8, 7 Z : 2, 8, 2 The correct one is Y is a non-metal and Z is a metal.
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