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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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Photons of energy 6 eV are incidented on a potassium surface of work function 2.1 eV. What is the stopping potential?
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Correct option: C
Option C ( - 3.9 V) is correct because the stopping potential is equal to the maximum kinetic energy of the emitted electrons divided by the elementary charge, and the maximum kinetic energy is the difference between the photon energy and the work function.
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S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
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Reason: The oscillating electric and magnetic fields produced by oscillating charged particles are parallel to each other and both are perpendicular to the direction of propagation of the wave. S-I: The orbital has maximum electron density along the y axis and its nodal plane is xz plane.
S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
S-II: The element helium was discovered in the sun by spectroscopic method. In which one of the following, the number of protons is greater than number of neutrons but number of protons is less than the number of electrons?