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NEETChemistryClassification of Elements and Periodicity in Properties

The correct decreasing order of atomic radii for Oxygen (O), Fluorine (F), and Neon (Ne) is:

Options

  1. AO F Ne
  2. BNe F O
  3. CNe O F
  4. DF O Ne

Correct answer

C. Ne O F

Step-by-step solution

Oxygen, Fluorine, and Neon belong to the second period of the periodic table. Generally, atomic radius decreases from left to right across a period due to an increase in effective nuclear charge. Therefore, the covalent radius of Oxygen is greater than that of Fluorine ( O F ). However, Neon is a noble gas. Noble gases do not form covalent molecules under normal conditions, so their atomic radii are expressed as van der Waals radii. Van der Waals radii are non-bonded radii and are significantly larger than the cova

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