Verified Solution • 2025–26 Session moderate

QJEEM20Ch5457: JEE Main 2020 Chemistry - Class 11 JEEM20Ch5457 Solution: The five successive ionization enthalpies of an element are…

The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol–1. The number of valence electrons in the element is :

Multiple Choice Options

  • A 2
  • B 3
  • C 4
  • D 5

Step-by-Step Verified Solution

There is a sudden jump after 3rd I.E. due to attainment of noble gas configuration.

So, the number of valence electrons in this element are 3.

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