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C) M shell can have upto 18 electrons. Then why Potassium (19) does not have the electronic configuration 2,8,9.​

Answer» <html><body><p>rule according to the energy of the electronsUp <a href="https://interviewquestions.tuteehub.com/tag/till-709848" style="font-weight:bold;" target="_blank" title="Click to know more about TILL">TILL</a> <a href="https://interviewquestions.tuteehub.com/tag/atomic-2477" style="font-weight:bold;" target="_blank" title="Click to know more about ATOMIC">ATOMIC</a> no. 20 the electronic configuration will be <a href="https://interviewquestions.tuteehub.com/tag/like-1073845" style="font-weight:bold;" target="_blank" title="Click to know more about LIKE">LIKE</a> 2,8,8,2 From atomic no 21 the electronic configuration will be like 2,8,9,2 and so on</p></body></html>


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