The statement that is not correct for periodic classification of eleme

1.	The statement that is not correct for periodic classification of elements is :
Answer» The properties of elements are PERIODIC FUNCTION of their atomic numbers. Non-metallic elements are less in NUMBER than metallic elements. For transition elements, the 3D-orbitals are filled with electrons after 3p-orbitals and before 4S-orbitals The first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period. Solution :Order of filling of electrons for trnsition metal in various orbitals is `3p lt 4s lt 3d` . Therefore, 3d orbital is filled when 4s orbital gets fully field by electrons.

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