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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
What is the distribution of electrons in an oxygen atom:
  • A
    (2, 4)
  • B
    (2, 8)
  • C
    (2, 6)
  • D
    (2, 10)
✓

Answer

  1. (2, 6)

Explanation:

The total number of electrons present in oxygen is 8.

Therefore, for O electron configuration will be 1s22s22p4.

The distribution of electrons in oxygen atom is given by:

First orbit or K shell = 2(2n2 = 2 × 11 = 2)

Second orbit or L shell = 6(8 − 2 = 6)

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