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MHT CET20244 May 2024Morning ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

Identify the element having lowest first ionization enthalpy.

Options

  1. APo
  2. BTe
  3. CBr
  4. DKr

Correct answer

A. Po

Step-by-step solution

The ionization enthalpy (I.E) decreases down the group due to increase in the atomic size. Therefore, I.E of Te is more than that of Po. Across a period, I.E increases with increase of atomic number. Therefore, I.E of Br and Kr is in the order: Br Kr . Hence, the correct decreasing order of I.E for the given elements is: Kr Br Te Po

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