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An electron revolves around a nucleus of charge . In order to excite the electron from the state to , the energy required is . is equal to,
(a)
(b)
(c)
(d)
(e)

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Important Questions on Modern Physics
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JEE Advanced
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An electron with kinetic energy is incident on a -atom in its ground state. The collision,

MEDIUM
JEE Advanced
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As per Bohr model, the minimum energy (in ) required to remove an electron from the ground state of doubly ionised atom is,

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IMPORTANT
The first excitation potential of hydrogen atom in the ground state is,

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If the wavelength of first member of Balmer series of hydrogen spectrum is , the wavelength of second member of Balmer series will be,

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Hydrogen atom emits blue light when it jumps from level to the level. Which colour of light would the atom emit when it changes from the level to level?

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The second line in the Paschen series is obtained when the electron makes the transition from

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The electron in a hydrogen atom makes the transition from -shell to -shell. The ratio of the magnitude of initial to the final acceleration of the electron is

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The orbital angular momentum of an electron in the shell of the element of atomic number is and the same in the shell of an element of atomic number is . If , then
