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Energy of first excited state in hydrogen atom is , then kinetic energy of electron in same orbit of hydrogen atom is
(a)
(b)
(c)
(d)

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Important Questions on Structure of Atom
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The energy of second Bohr orbit of the hydrogen atom is , hence, the energy of the fourth Bohr orbit would be

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The uncertainty involved in the measurement of velocity of electron within a distance of is
(Given: The mass of electron is , Planck's constant is )

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Consider the following sets of quantum numbers:
(i) | ||||
(ii) | ||||
(iii) | ||||
(iv) | ||||
(v) |
Which of the following sets of quantum number is not possible?

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