Chemistry Chemical Bonding MDCAT 2011
PMDC Verified Question 99 of 102
The elements for which the value of ionization energy is low can:
A
Gain electrons readily
B
Gain electrons with difficulty
C
Lose electron less readily
D
Lose electron readily
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Lose electron readily
Concept:

Ionization Energy (IE) is the energy required to remove the outermost electron. It is inversely proportional to an element's ability to lose electrons.

Formula:

$$ \text{Low IE} \implies \text{Easy removal of electrons} $$

Solution:

  • A low IE means the electrostatic pull of the nucleus on the outermost electrons is weak (due to large atomic radius or strong shielding).


  • Consequently, very little energy is needed to detach these electrons.


  • Such elements (like alkali metals) are highly electropositive and lose electrons readily.


Why other options are incorrect:

  • Option A: Describes elements with high electron affinity, not low IE.
  • Option C: Describes elements with high IE (like noble gases or halogens).

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