Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 38

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Using the Balmer formula, we get the shortest wavelength of Balmer series for:

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Important Questions on Atoms

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 39

If the mass of electron is reduced to half, Rydberg constant :

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 40

Given the value of Rydberg constant is

10^{7} m^{- 1}

, the wave number of the last line of the Balmer series in hydrogen spectrum will be:

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 41

Find the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its second permitted energy level to the first level to the highest permitted energy level to the first permitted level.

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 42

Number of neutrons in

C^{12}

and

C^{14}

are

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 43

The lifetime of an electron in the state

n = 2

in the hydrogen atom is about

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 44

Three photons coming from excited atomic hydrogen sample are observed, their energies are

12.1 V

,

10.2 V

and

1.9 eV

. These photons must come from

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 45

The angular momentum of an electron in first orbit of

{Li}^{+ +}

ion is:

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 46

To which of the following is Bohr's theory applicable?