High School

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An energy of 24.6 eV is required to remove one of the electrons from a neutral helium atom. What is the energy (in eV) required to remove both electrons from a neutral helium atom?

A. 38.2
B. 49.2
C. 51.8
D. 79

Answer :

Final answer:

The total energy required to remove both electrons from a neutral helium atom is the sum of the first and second ionization energies, which is 79.01 eV. Hence, the answer is D. 79 eV.

Explanation:

The energy required to remove one of the electrons from a neutral helium atom is 24.6 eV. To remove both electrons from a neutral helium atom, the total energy required is the sum of the first ionization energy plus the second ionization energy. The first ionization energy, I₁, is 24.59 eV, and the second ionization energy, I₂, is 54.42 eV. Thus, the total energy required to remove both electrons would be I₁ + I₂ = 24.59 eV + 54.42 eV = 79.01 eV. Therefore, the correct answer is D. 79 eV.

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Rewritten by : Jeany