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Which of the following set of quantum number is possible?

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Important Questions on Structure of Atom

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The maximum number of electrons in an atom which can have n=4 is
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In the presence of magnetic field, the possible number of orientations for an orbital of azimuthal quantum number 3, is
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For a 'p' electron , the orbital angular momentum is
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Which of the following electronic level would allow the hydrogen to absorb a photon but not emit a photon?
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Which of the following transition will emit maximum energy in hydrogen atom?
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In an atom, which has 2K, 8L,18M and 2N electrons in the ground state. The total number of electrons having magnetic quantum number, m = 0 is
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The probability density curve for 2s electron appears like