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 along a period do not vary in a regular manner with increase in atomic number
  • D
    For transition elements the $d$-sub-shells are filled with electrons monotonically with increase in atomic number

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$(I) \ [Xe] 6s^1$
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