1.

(1) Give electronic configuration of the following species and show which of these contain same number of electrons: Cl^(-),N^(3-),P^(3-),K^(+),Na^(+),Mg^(2+),Ar,S^(2-),Ne,O^(2-),Al^(3+),Ca^(2+). (2) In an atom of an inert gas, the difference between the number of p-electrons and s-electrons is equal to the number of d-electrons present in that atom. identify the inert gas and indicate its atomic number.

Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :(1) <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/CHY_CHE_XI_P1_U02_E03_065_S01.png" width="80%"/> <br/> So, `N^(3-),Na^(+),Mg^(2+),O^(2-)Ne,Al^(3+)` have the <a href="https://interviewquestions.tuteehub.com/tag/samme-7626862" style="font-weight:bold;" target="_blank" title="Click to know more about SAMME">SAMME</a> number of electrons (10), so they are isoelectronic. Electronic configuration of each of them `<a href="https://interviewquestions.tuteehub.com/tag/1s-283076" style="font-weight:bold;" target="_blank" title="Click to know more about 1S">1S</a>^(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^(6)`. <br/> Again, `Cl^(-),P^(3-),K^(+),Ar,S^(2-)` and `Ca^(2+)` have the same number of electrons (18), so they are isoelectronic. their electronic configuration is: <br/> `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)` <br/> (2) The inerrt gas is krypton (Kr) whose atomic number is 36, has electronic configuration: <br/> `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)<a href="https://interviewquestions.tuteehub.com/tag/4s-318811" style="font-weight:bold;" target="_blank" title="Click to know more about 4S">4S</a>^(2)4p^(6)` <br/> Total number of s-electrons=8 and total number of p-electrons=18 <br/> `therefore`Difference in the number of s and p- electrons <br/> `therefore`Difference in the number of s and p-electrons=18-8=10=number of d-electrons.</body></html>


Discussion

No Comment Found

Related InterviewSolutions