s block elements, Chemistry

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Steric effect, steric effect affecting the end product of organic compound

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The electronic configuration of gadolinium (atomic no. 64) is: (1)  [Xe]4s 8 5d 9 6s 2                           (2) [Xe] 4s 1 5d 1 6s 2             (3) [Xe]4s 3 5d

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The total number of electrons that can be accommodated in all the orbitals having principal quantum number 2 and azimuthal quantum number 1 is: (1) 2        (2) 4

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