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STD 11 - 3. Classification of elements and periodicity in properties — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 3. Classification of elements and periodicity in properties4 Marks
MCQ
If $A$ is $[Rn]\,6d^2\,7s^2$ then identify block, period, group?
  • A
    $d-$ block, $IV B, 7^{th}$
  • B
    $d-$ block, $III$ $B, 7^{th}$
  • C
    $f-$ block, $III$ $B, 6^{th}$
  • ✓
    $f-$ block, $III$ $B, 7^{th}$
✓

Answer

Correct option: D.
$f-$ block, $III$ $B, 7^{th}$
d
$A = {}_{86}\left[ {Rn} \right]\,6{d^2}\,7{s^2}$

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