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NTA Abhyas NEET2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

Which of the following orders of ionic radii is correctly represented?

Options

  1. AH - > H > H +
  2. BA l 3 + > M g 2 + > N 3 –
  3. CF – > O 2 – > N a +
  4. DN a + > F - > O 2 -

Correct answer

A. H - > H > H +

Step-by-step solution

As size ∝ e p ratio for ions. Size of anion > size of atom > size of cation H - > H > H + In case of F - , O - 2 , N a + radii order is O - 2 > F - > N a + correct order for A l + 3 , M g + 2 , N - 3 is N - 3 > M g + > A l + 3

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