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AP EAMCET202021 Sep 2020Evening ShiftChemistryd and f Block ElementsActual

Which element of the (3 d )-series has highest third ionisation enthalpy?

Options

  1. A( Mn )
  2. B( Zn )
  3. C( Fe )
  4. D( Cu )

Correct answer

B. ( Zn )

Step-by-step solution

The electronic configuration of zinc metal is ( Zn [ Ar ] 3 d¹⁰, 4 s^2 ) The third ionisation enthalpy of ( Zn ) means removal of electron from the stable configuration of (3 d¹⁰ ). The metal having the highest third ionisation enthalpy is ( Zn ). Hence, the correct option is (b).

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