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AIIMS2016ChemistryStructure of Atom

Assertion : For hydrogen like species, energy of an electron in a particular orbit increases with increase in value of Z . Reason : Electronegativity decreases across a period.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

For hydrogen like species, energy of an electron in n^ th orbit is given by E_n=- 2 ^2 m Z^2 e^4 k^2 n^2 h^2 i.e., E_n Z^2 . Electronegativity increases across a period with decrease in size of atoms.

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