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 statement that is not correct for periodic classification of elements is: (i) The properties of elements are periodic function of their atomic numbers. (ii) Non metallic elements are less in number than metallic elements. (iii) For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals. (iv) The first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period. Solution: (iii) For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.

The statement that is not correct for periodic classification of elements is

Answer»

The statement that is not correct for periodic classification of elements is:
(i) The properties of elements are periodic function of their atomic numbers.
(ii) Non metallic elements are less in number than metallic elements.
(iii) For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.
(iv) The first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period.

Solution:

(iii) For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.

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