Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Which of the following statements is not correct for the periodic classification of elements?
A
Non-metallic elements are lesser in number than metallic elements.
B
For transition elements, the 
-subshells are filled with electrons monoatomically with the increase in atomic number.
-subshells are filled with electrons monoatomically with the increase in atomic number. C
The first ionisation energies of elements along a period do not vary in a regular manner with the increase in atomic number.
D
Metallic radius is usually not defined for 
-block elements.
-block elements.
Text Solution
Verified by ExpertsThe correct answer is:
B
Among the given statements, only statement is not correct for the periodic classification
of elements because there are deviations, while filling the 
-sub shells for example at 
and 
, in the first transition series.
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