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JEE Main202118 Mar 2021Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

The first ionization energy of magnesium is smaller, as compared to that of elements X and Y , but higher than that of Z . The elements X , Y and Z , respectively, are :

Options

  1. Achlorine, lithium and sodium
  2. Bargon, lithium and sodium
  3. Cargon, chlorine and sodium
  4. Dneon, sodium and chlorine

Correct answer

C. argon, chlorine and sodium

Step-by-step solution

The 1 st IE order of 3 rd period is Na < Al < Mg < Si < S < P < Cl < Ar X   &   Y are Ar   &   Cl Z is sodium ( Na ) .

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