1.

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 very in a regular manner with increase in atomic number.(d) For transition elements the d-subshells are tilled with electrons monotonically with increase in atomic number.

Answer»

Correct option (d) For transition elements the d-subshells are tilled with electrons monotonically with increase in atomic number.

Explanation:

Among transition elements. electrons are not filled in d-subshell monotonically with increasing atomic number.



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