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- Which quantum number has different values for the two electrons of hel...
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- Mention the four quantum numbers of the last electron of sodium.
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- What is the difference between two isotopes of an element ? Give one e...
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- Calculate the number of electrons, protons and neutrons in the followi...
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- What is uncertainty principle ?
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- Calculate the energy of the photon of wave-length 4500A. Given h= 6.6x...
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- Write the composition of the nucleus and the electronic configuration ...
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- Calculate the momentum of wave-length 0.33 nm.
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- Calculate the energy of photon of radiations having v = frequency 5xx1...
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- With what velocity must an electron travel so that its momentum is equ...
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- Why is the electronic configuration, 1s^2, 2s^2, 2px^(2), 2py^(1), 2pz...
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- Mass of neutron is……..times the mass of electron.
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- The maximum number of unpaired electrons present in 4f-energy level is...
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- Which is not deflected by magnetic field ?
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- In the atomic spectrum of hydrogen the series of lines observed in the...
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- The maximum sum of the number of neutrons and protons in an isotope of...
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- Which of the subshell has double dumb-bell shape ?
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- Which one of the following pairs of atoms/atom-ions have identical gro...
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- The ratio of nucleons in O^16 and O^18 is:
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- The number of unpaired electrons in Mn^+ is:
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