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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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Statement I : Chemical properties of atoms are controlled by the number of protons, which are determined by the number of electrons in the valence shell.
Statement II : The number of proton is equal to the number of electron in an electrically neutral atom
Statement II : The number of proton is equal to the number of electron in an electrically neutral atom
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Correct option: D
Statement II is correct but Statement I is incorrect
Statement II is correct because in an electrically neutral atom, the number of protons equals the number of electrons. Statement I is incorrect because chemical properties are primarily determined by the number of electrons in the valence shell, not the number of protons directly.
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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.
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?