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Which of the activities can be compared to the concept of quantisation?

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Important Questions on Atomic Structure

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Which of the following elements has the highest work function value?
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Two series of spectral lines of atomic hydrogen which do not belong to infrared spectral region are
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The energy of an electron in the 3rd orbit of H-atom (in J) is approximately:
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The wavelength (in m) of a particle of mass 11.043×10-26 kg moving with a velocity of 6.0×107 ms-1 is ______

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The radius of the 2nd  orbit of B4+ ion is:
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Which of the following relations is correct, if the wavelength (λ) is equal to the distance travelled by the electron in one second?
h is the planck's constant and m is the mass of electron
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For an electron in the d-orbital, the orbital angular momentum is
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The product of uncertainty in the position and uncertainty in the velocity of a particle is 5.79×10-5 m2 s-1. If the uncertainty in the position is 1nm, what is the uncertainty in the measurement of its velocity in ms-1?