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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 numbers.
B. Non-metallic elements are lesser in number than metallic elements.
C. The first ionixation 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.

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