MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryPeriodic PropertiesIonization Enthalpy

The correct order in which the first ionization potential increases is

A.Na, K, Be

B.K, Na, Be✓ Correct

C.K, Be, Na

D.Be, Na, K

Explanation

Ionization energy is the amount of energy required to remove an electron from a neutral gaseous atom. The trend of ionization energy decreases down the group due to an increase in atomic size and increases from left to right in periods due to the decrease in atomic size. Therefore, the correct order is K < Na < Be .

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