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2.
Which one of the following statement is incorrect
a) More the screening effect, lesser will be the ionisation enthalpy
b) Size of a cation is smaller than its parent atom
c) 5th period of the periodic table consists of 32 elements
d) Electron affinity increases along the period

Verified Answer :

GinnyAnswer

Final answer:

The incorrect statement is identified among the options given, specifically regarding ionization enthalpy in relation to screening effect.


Explanation:

The incorrect statement among the options provided is:

  1. More the screening effect, lesser will be the ionisation enthalpy: This statement is incorrect as higher screening effect leads to lower ionization enthalpy.
  2. Size of a cation is smaller than its parent atom
  3. 5th period of the periodic table consists of 32 elements
  4. Electron affinity increases along the period

Ionization energy increases across a period due to the increased effective nuclear charge, attracting electrons more strongly.


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