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Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom2 Marks
Question
The electronic configurations of some elements are given below. Name the elements. 
  1. 2, 8, 5
  2. 2, 8, 8, 2
  3. 2, 8, 1
✓

Answer

  1. The electronic configuration is given as 2, 8, 5.

= 2 + 8 + 5 = 15

  1. The electronic configuration is given as 2, 8, 8, 2.

= 2 + 8 + 8 + 2 = 20.

  1. He electronic configuration is given as 2, 8, 1.

= 2 + 8 + 1 = 11.

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