Shib Sagar posted an Question
July 13, 2020 โ€ข 06:50 am 30 points
  • IIT JAM
  • Chemistry (CY)

Explain this how to use those formulas give 2,3 examples

tive nuclear BOund state t is this nis orbital that is occupicd. Z f

2 Answer(s) Answer Now
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  • comment-profile-img>
    Priyanshu kumar best-answer

    check this...how you can proceed for all these

    cropped456912535217677497.jpg
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    check this shib

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    sir I m not clear about this topic and I m also confuse when I use these formula and the other one which is like zeff=z-sigma

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    mainly i have attached images about slater rules..so that you can easily find screening constant that is sigma...and nuclear charge is nothing but this is atomic number

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    the formula which is given in your booklet..it is derived from general formula by taking n

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    Don't be learn formula type...try to focus on concept behind slater's rule...it helps

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    and the screening effect is caused by internal electrons between nucleus and considering electrons...so dont be confuse here

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    got shib or still any doubt then ask?

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    sir i solved many problems regarding Zeff=Z-sigma but my confusion is for last electron of 2nd periond and last electron of d orbital that when i will use that formula instead of 1st one

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    yes see when the transition series comes then effective nuclear charges changes as d electrons comes...so use the formula which i have attached in the images

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    see this one..last part...read step 3...when 2nd orbit comes and when 3rd means d orbital comes

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    shib you can always use Zeff=Z - sigma...changes comes here in finding sigma value...so proceed the way which i have written to find sigma value

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    shib please mark the answer too if your queries is resolved๐Ÿ˜Š

  • comment-profile-img>
    Priyanshu kumar

    don't be confuse....first arrange the electron configuration in the proper way as given in the image then find the value of screening constant

    cropped2604233198614498999.jpg
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    please mark the answer if it helps u shib๐Ÿ˜Š๐Ÿ™

  • comment-profile-img>
    Priyanshu kumar

    use this way shib

    cropped4029054026990036124.jpg
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    got it shib if you have any doubt in this then please ask and clear your doubt

  • comment-profile-img>
    Dinesh khalmaniya 1 Best Answer

    some examples

    cropped2630987600475904283.jpg
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    accept the answer if you got it ๐Ÿ™๐Ÿ™

  • comment-profile-img>
    Dinesh khalmaniya 1

    now you can apply these formula for those which are given in you booklet.

  • comment-profile-img>
    Dinesh khalmaniya 1

    you can't use this formula for exceptional configuration such as Cr, Cu

  • comment-profile-img>
    Dinesh khalmaniya 1

    2nd formula is wrong. please use formula provide by me

    cropped8206971593609680042.jpg
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    dis you get it???

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    please accept the answer if you got it ๐Ÿ™๐Ÿ™

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    sir pz tell me when I will use these formulas I am not clear about the last electron of 2nd period

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    here this formula is used only for the electron present in 3d orbital so we will use the n value of n is equal to number of electrons in 3d orbital

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    got it??

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    such as for Sc =3d1 , n= 1, for Fe = 3d6 n= 6

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    got it??

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    sir for Sc and Fe i can use Zeff=Z-sigma this formula??

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    yes, why not

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    but you can't use this formula for Cr, and Cu because they have exceptional configuration

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    but I'll specially suggest you to uss systematic method to calculate Zยฐ

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