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Structure of the Atom — Science STD 9 — Question

Gujarat 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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