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Bond Order and Enthalpy

Applying Aufb...

Question

Applying Aufbau principle, write the electronic configuration of element with Z=21.

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Solution

Electronic configuration of 21 is
$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{1} T h e e l e m e n t i s s c a n d i u m - S c$

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