InterviewSolution
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InterviewSolution
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The statement that is not correct for periodic classification of elements isA. The properties of elements are periodic function of their atomic numbersB. Non-metallic elements are less in number than metallic elementsC. For transition elements,the 3d orbitals are filled with electrons after 3p orbitals and before 4 s orbitalsD. The first ionization enthalpies of elements generally increase with increase in atomic number as we go along a period. |
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Answer» Correct Answer - C According to aufbau principle,"in the ground state of the atoms,the orbitals are filled in order of their increasing energies".The increasing order of energy acccording to (n+1) rule is:1s,2s2p,3s,3p,4s,3d,4p,5s….etc. Therefore,the 3d orbitals are filled with electrons after 4s orbitals and before 4p orbitals. |
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