4. Which of the following is/are true a) Multiplicity in Fe3+ is greater than in Co3+ b) Ti3+, Cr+, Sc2+ ions are diamagnetic c) value of (n+l+m)for last electron of mg is 3 d) The value of Zeff for 3s electron of Cl is 10.9
plz explain every option
Answers
Explanation:
Answer:
Element: N Slater
Configuration 1s2
2s2
2p3
n-value grouping (1s)2
(2s2p)5
groupings via Slater. (1s)2
(2s2p)5-1=4
Slater’s shielding value and Zeff. 1 X 0.85 + 4X 0.35 =3.1
7- 3.1 = 3.9
Element: C Slater
Configuration 1s2
2s2
2p2
n-value grouping (1s)2
(2s2p)4
groupings via Slater. (1s)2
(2s2p)4-1=3
Slater’s shielding value and
Zeff.
1 X 0.85 + 3 X 0.35 =2.75
6- 2.75=3.25
Element: Mg Slater
Configuration 1s2
2s2
2p6
3s2
n-value grouping (1s)2
(2s2p)8
(3s3p)2
groupings via Slater. (1s)2
(2s2p)8
(3s3p)2-1=1
Slater’s shielding value and Zeff. 12-9.15=2.85
Element: Cl Slater
Configuration 1s2
2s2
2p6
3s2
3p5
n-value grouping (1s)2
(2s2p)8
(3s3p)7
groupings via Slater. (1s)2
(2s2p)8
(3s3p)7-1=6
Slater’s shielding value and Zeff. 17-10.9= 6.1
Element: Zn Slater
Configuration 1s2
2s2
2p6
3s2
3p6
3d104s2
n-value grouping (1s)2
(2s2p)8
(3s3p)8
(3d)104s2
groupings via Slater. (1s)2
(2s2p)8
(3s3p)8
(3d)104s2-1=1
Slater’s shielding value and Zeff. 30- 25.65 = 4.35
Element: Te Slater
Configuration 1s2
2s2
2p6
3s2
3p6
4s2
3d104p6
4d105s2
5p4 [4f0
]
n-value grouping (1s)
2
(2s2p)
8
(3s3p)
8
(3d)
10(4s4p)
8
(4d)
10(4f)
0
(5s5p)
6
groupings via Slater. (1s)
2
(2s2p)
8
(3s3p)
8
(3d)
10(4s4p)
8
(4d)
10(4f)
0
(5s5p)
6-1=5
Slater’s shielding value and 2+8+8+10+18x0.85+5x035=45.05