Home Chemistry Classification of Elements and Periodicity Electronegativity Explain the following according to Modern pe…
Chemistry Classification of Elements and Periodicity Electronegativity Single Correct MCQ
Published on: August 11, 2026

Explain the following according to Modern periodic table :

A
Electronegativity of elements increase on moving from left to right in a period.
B
Ionisation enthalpy decrease in a group from top to bottom.

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On moving left to right in a period, tendency of an atom to attract the shared electron pair towards itself increases due to increasing Z eff . So, electronegativity of elements increase on moving from left to right in a period.

On moving top to bottom in a group, size increases due to addition of extra shells. So, attraction of nucleus outermost electron decreases. So, ionisation enthalpy decrease in a group from top to bottom.

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