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Atoms and Molecules — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
What do the following abbreviation stand for?
  1. O
  2. 2O
  3. O2
  4. 3O2
✓

Answer

  1. O- One atom of oxygen.
  2. 2O- Two separate atoms of oxygen.
  3. O2- One molecule of oxygen.
  4. 3O2- Three molecules of oxygen.

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