JEE PHYSICS MCQ: ATOMS

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The energy required to remove one of the electrons from a neutral helium atom is 24.6 eV. The energy required to remove both the electrons from a neutral helium atom is

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Correct option: D

79 eV

Option D (79 eV) is correct because the total energy required is the sum of the energy to remove the first electron (24.6 eV) and the ionization energy of He+ (54.4 eV).

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The de-Broglie wavelength of an electron in the first Bohr orbit is The volume occupied by an atom is greater than the volume of the nucleus by a factor of about For a hydrogen atom, when electron jump from

n

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{n}=1

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\lambda_0

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\lambda_0

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{R_H} = 1.097\,\, \times \,\,{10^7}\,\,m

, first and second wavelength of Balmer series in hydrogen spectrum is When hydrogen atom is in its first excited level, its radius is its ground state radius