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First orbit velocity of electron is , then the velocity of orbit electron is
(a)
(b)
(c)
(d)

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Important Questions on Atoms, Molecules and Nuclei
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The ionization potential of a hydrogen atom is What will be the energy of the atom corresponding to

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Energy of a hydrogen atom with principal quantum number n is given by . The energy of a photon ejected when the electron jumps from state to state of hydrogen is approximately

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For the hydrogen atom, the energy of radiation emitted in the transition from excited state to excited state, according to Bohr's theory is

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Energy required for the electron excitation in from the first to the third Bohr orbit is

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The ionisation potential of hydrogen atom is . The energy required to remove an electron in the state of the hydrogen atom is

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An electron collides with a hydrogen atom in its ground state and excites it to state. The energy given to the hydrogen atom in this inelastic collision (neglecting the recoil of hydrogen atom) is

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The ground state energy of hydrogen atom is . What is the potential energy of the electron in this state?

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The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is
