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4. d and f- block elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry4. d and f- block elements1 Mark
MCQ
The general electronic configuration of transition elements is
  • A
    $(n - 1){d^{1 - 5}}$
  • B
    $(n - 1){d^{1 - 10}}n{s^1}$
  • ✓
    $(n - 1){d^{1 - 10}}n{s^{1 - 2}}$
  • D
    $n{s^2}(n - 1){d^{10}}$
✓

Answer

Correct option: C.
$(n - 1){d^{1 - 10}}n{s^{1 - 2}}$
c
Generally, d-block elements are called transition elements as they contain inner partially filled d-subshell. Thus, their general electronic configuration is $( n -1) d ^{1-10}, ns ^{1-2}$

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