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Chemistry
Which of the following electronic configuration is incorrect?
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Q. Which of the following electronic configuration is incorrect?
Structure of Atom
A
$1 s^{2}, 2 s^{2}, 2 p_{x}^{2}, 2 p_{y}^{2}, 2 p_{z}^{2}, 3 s^{2}, 3 p_{x}^{1}$
B
$1 s^{2}, 2 s^{1}, 2 p_{x}^{1}, 2 p_{y}^{1}, 2 p_{z}^{1}$
C
$1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 3 d^{6}, 4 s^{2}$
D
$1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p_{x}^{1}, 3 p_{y}^{1}, 3 p_{z}{ }^{1}$
Solution:
Before 2s completely filled electrons are not further added into higher energy level. Therefore Option 2 incorrect.