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NEET 2002
Exam
NEET
Year
2002
Subject
Chemistry
Chapter
d and f Block Elements

NEET 2002 · Chemistry · d and f Block Elements

General electronic configuration of lanthanides is:

General electronic configuration of lanthanides is:

Options

  1. A(n−2)f1−14(n−1)d0−1ns2(n-2) f^{1-14}(n-1) d^{0-1} n s^2
  2. B(n−2)f10−14(n−1)d0−1ns2(n-2) f^{10-14}(n-1) d^{0-1} n s^2
  3. C(n−2)f0−14(n−1)d10ns2(n-2) f^{0-14}(n-1) d^{10} n s^2
  4. D(n−2)d0−1(n−1)f−14ns2(n-2) d^{0-1}(n-1) f^{-14} n s^2

Correct answer

A. (n−2)f1−14(n−1)d0−1ns2(n-2) f^{1-14}(n-1) d^{0-1} n s^2

Step-by-step solution

The general electronic configuration is (n−2)f−14(n−1)d0−1ns2(n-2) f^{-14}(\mathrm{n}-1) \mathrm{d}^{0-1} n s^2 Related Theory (
ElementGeneralouterelectronicconfiguration\begin{array}{l} General outer electronic configuration \end{array}
s -blockn s^{l-2} , wheren n=2-7
p-blockn s^2 n p^{\prime 4}, wheren n=2-6
d-block(n−l)d1−10,ns0−2,wheren=4−7\begin{array}{l} (n-l) d^{1-10}, n s^{0-2} , where n= 4-7 \end{array}
f-block(n−2)f1−14(n−l)dn−1ff−14ns2,</td></tr><tr><td>wheren=6−7\begin{array}{l} (n-2) f^{1-14}(n-l) d^{n-1} f^{f-14} n s^2,</td></tr><tr><td>where n=6-7 \end{array}
)
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