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Question: Answered & Verified by Expert
Among alkali metals, which element do you expect to be least electronegative and why?
ChemistryClassification of Elements and Periodicity in PropertiesNEET
Options:
  • A Lithium, due to its smaller atomic size and lower effective nuclear charge.
  • B Sodium, as it has a completely filled inner electron shell, reducing its affinity for additional electrons.
  • C Cesium, because of its larger atomic size and weaker electron-nucleus attraction.
  • D Rubidium, as it is at the bottom of the group, with the least tendency to attract electrons.
Solution:
2258 Upvotes Verified Answer
The correct answer is: Cesium, because of its larger atomic size and weaker electron-nucleus attraction.
Correct Option is : (C)
Cesium, because of its larger atomic size and weaker electron-nucleus attraction.

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