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A neutral atom of element has 2K, 8K and 5M electrons. Find out the following : (a) Atomic No. of the element (b) Total No. of s electrons (c) Total No. of p- electrons(d) No. of protons in the nucleus and (e) Valency of the element.

Answer» <html><body><p></p>Solution :The electronic <a href="https://interviewquestions.tuteehub.com/tag/configuration-11827" style="font-weight:bold;" target="_blank" title="Click to know more about CONFIGURATION">CONFIGURATION</a> of the <a href="https://interviewquestions.tuteehub.com/tag/element-969236" style="font-weight:bold;" target="_blank" title="Click to know more about ELEMENT">ELEMENT</a> with with <a href="https://interviewquestions.tuteehub.com/tag/2k-300402" style="font-weight:bold;" target="_blank" title="Click to know more about 2K">2K</a>, 8L and 5M electrons will be<br/> `1s^(2)<a href="https://interviewquestions.tuteehub.com/tag/2s-301125" style="font-weight:bold;" target="_blank" title="Click to know more about 2S">2S</a>^(2) 2p_(x)^(2) 2p_(y)^(2) 2p_(z)^(2) 3s^(2) 3p_(x)^(1) 3p_(y)^(1) 3p_(z)^(1)` <br/> (a) Total no. of electrons `=2+8+5=<a href="https://interviewquestions.tuteehub.com/tag/15-274069" style="font-weight:bold;" target="_blank" title="Click to know more about 15">15</a> :.` Atomic No. of the element `=15` <br/> (b) Total no. of s-electrons `=2+2+2=6` <br/> (c) Total no. of p-electron `=6+3=9` <br/> (d) Since the atom is neutral, `:.` No. of protons = No. of electrons = Atomic No. `=15` <br/> (e) Since the element has only three half-filled atomic orbitals, therefore, valency of the element `=3`.</body></html>


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