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The statement that is not correct for the periodic classification of elements is `:`a)The properties of elements are the periodic functions of their atomic numbers.b)non-metallic elements are lesser in number than metallic elements.c)the first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number.d)for transition elements the `d-` subshells are filled with electrons monotonically with increase in atomic number.A. the properties of elements are the periodic functions of their atomic numbersB. non-metallic elements are lesser in number than metallic elementsC. the third period contains 8 elements and not 18 as 4th period containsD. for transition elements the d-subshells are filled with electrons monotonically with increase in atomic number

Answer» Correct Answer - D


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