Home Chemistry Classification of Elements and Periodicity Ionisation Energy Which group of elements shows lowest ionizat…
Chemistry Classification of Elements and Periodicity Ionisation Energy Single Correct MCQ
Published on: August 12, 2026

Which group of elements shows lowest ionization enthalpy?

A
Alkali metals
B
Alkaline earth metals
C
Halogens
D
Noble gases

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Verified by Experts
The correct answer is:
A

Ionisation energy increases along a period. Alkali metals can most easily lose electron to attain noble gas configuration.

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