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Page No 222: - Chapter 8 - D & F - Block Elements - Intext Solutions - Ncert Solutions class 12 - Chemistry

Updated On 26-08-2025 By Lithanya

You can Download the Page No 222: - Chapter 8 - D & F - Block Elements - Intext Solutions - Ncert Solutions class 12 - Chemistry with expert answers for all chapters. Perfect for Tamil & English Medium students to revise the syllabus and score more marks in board exams. Download and share it with your friends

Question 8.8:

Calculate the ‘spin only’ magnetic moment of M2+(aq) ion (Z = 27).

Answer:

Z = 27

https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/267/6637/NCERT(INTEXT)17-11-08_Sonali_12_Chemistry_8_10_html_74849e29.gif  [Ar] 3d7 4s2

https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/267/6637/NCERT(INTEXT)17-11-08_Sonali_12_Chemistry_8_10_html_4dd19828.gif  M2+ = [Ar] 3d7

3d7 = https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/267/6637/NCERT(INTEXT)17-11-08_Sonali_12_Chemistry_8_10_html_371fbaf8.jpg

i.e., 3 unpaired electrons

https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/267/6637/NCERT(INTEXT)17-11-08_Sonali_12_Chemistry_8_10_html_4dd19828.gif  n = 3

https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/267/6637/NCERT(INTEXT)17-11-08_Sonali_12_Chemistry_8_10_html_69d9ff27.gif

μ ≈ 4 BM

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