Q.
The atomic numbers of elements X, Y and Z are 19,21 and 25 respectively. The number of electrons present in the M-shell of these elements follow the order
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a
Z>X>Y
b
X>Y>Z
c
Z>Y>X
d
Y>Z>X
answer is C.
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Detailed Solution
Symbols =KLMNX 19 =2881Y 21 =2892Z 25 =28132Hence, the order of number of electrons in M shell is Z>Y > X.
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