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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
1
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Application
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If Aufbau rule is not followed, K-19 will be placed in
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Correct option: C
d-block
Option D is correct because if the Aufbau principle is not followed, the electronic configuration of K-19 would be different, potentially placing it in the d-block due to filling of the (n-1)d orbitals before the ns orbital.
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The elements with zero electron affinity are
S-I: paramagnetic.
S-II: All the orbitals present in ion are doubly occupied. Which of the following is the most electropositive element? The law of Octaves is not applicable to: Assertion (A): Mendeleev's arranged elements in horizontal rows and vertical columns.
Reason (R): Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect. Which of the following electronic configuration does not belong to same block as others?
S-II: All the orbitals present in ion are doubly occupied. Which of the following is the most electropositive element? The law of Octaves is not applicable to: Assertion (A): Mendeleev's arranged elements in horizontal rows and vertical columns.
Reason (R): Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect. Which of the following electronic configuration does not belong to same block as others?