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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
MCQ
From the following, identify least reactive element:
  • A
    8​Y16
  • B
    10​Y20
  • C
    11​Y23
  • D
    9​Y19
✓

Answer

  1. 10​Y20

Explanation:

Element, 10​Y20 has the electronic configuration as 2, 8 has completely filled valence shell.

So, it is least reactive.

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