Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 1

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In scattering experiment, find the distance of closest approach, if a $6 MeV α$ -particle is used

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Important Questions on Atoms

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 2

The angular momentum of an electron in a hydrogen atom is proportional to (where

n

is principle quantum number)

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 3

What is the angular momentum of an electron in Bohr's hydrogen atom, whose energy is

- 0.544 eV

?

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 4

The energies of three conservative energy levels

L_{3}, L_{2}

and

L_{1}

of hydrogen atom are

E_{0}, \frac{4 E_{0}}{9}

and

\frac{E_{0}}{4}

respectively. A photon of wavelength

λ

is emitted for a transition

L_{3}

to

L_{1} .

What will be the wavelength of emission for transition

L_{2}

to

L_{1}

?

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 6

When an electron is excited to

n^{th}

excited energy state in hydrogen atom, then the possible number of spectral lines emitted are

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 7

In which transition of a hydrogen atom, photons of lowest frequency are emitted?

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 8

The binding energy of an electron in

4^{th}

orbit of hydrogen atom is

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>EXERCISE>Q 9

Three energy levels

L_{1}, L_{2}

and

L_{3}

of a hydrogen atom correspond to increasing values of energy i.e.,

E_{L_{1}} < E_{L_{2}} < E_{L_{3}} .

If the wavelength corresponding to the transitions

L_{3}

to

L_{2}, L_{2}

to

L_{1}

and

L_{3}

to

L_{1}

are

λ_{3}, λ_{2}

and

λ_{1}

respectively then

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Gamma Question Bank for Medical Physics>Chapter 29 - Atoms>Assigment>Q 5

In Bohr's model of the hydrogen atom the ratio between the period of revolution of an electron in the orbit of

n = 1

to the period of the revolution of the electron in the orbit

n = 2

is:-