Atoms & Nuclei

JEE Main level, single correct, medium

79 of 239

Question 79 of 239

The energy required to remove the electron from a singly ionized Helium atom is 2.22.2 times the energy required to remove an electron from helium atom. The total energy required to ionize the Helium atom completely is close to

Show answer and solution

Answer: (C) 79eV79eV

The energy is required to remove e−{\text{e}}^{-} from singly ionized helium atom=54.4eV=54.4eV. The energy required to remove e−{\text{e}}^{-} from a helium atom =xeV=xeV, given 54.4eV=2.2x⇒x=24.73eV54.4eV=2.2x\Rightarrow x=24.73eV. The energy required to ionize helium atom =79.13eV≈79eV=79.13eV\approx 79eV.

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.
See it move: Atoms: Rutherford, Bohr and X-rays simulationDrag the sliders and watch the numbers in this question change.Revise Modern Physics firstFormula sheet, solved examples and the traps students fall into.

More Physics practice

JEE Main Physics practice question on Atoms & Nuclei (Bohr's Atomic Model), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.