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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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Which one of the following set of quantum numbers is possible for electron in the ground state of an atom with atomic number 19?
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Correct option: D
Option D () is correct because the ground state electronic configuration of an atom with atomic number 19 (Potassium) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹, and the last electron occupies the 4s orbital, which has n=4, l=0, and m=0.
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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?