The energy required to remove the electron from a singly ionized Helium atom is 2 . 2 times the energy…

The energy required to remove the electron from a singly ionized Helium atom is 2.2 times the energy required to remove an electron from helium atom. The total energy required to ionize the Helium atom completely is close to
  1. 34 eV
  2. 20 eV
  3. 79 eV
  4. 109 eV

Solution

The energy is required to remove e − from singly ionized helium atom= 54.4 eV. The energy required to remove e − from a helium atom =x eV, given 54.4 eV=2.2 x⇒x=24.73 eV. The energy required to ionize helium atom = 79.13 eV≈79 eV.

Asked in: JEE Main 2018 (15 Apr)

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