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Question
The non-radio active metal of IIA group having least first ionisation potential is :
The non-radio active metal of IIA group having least first ionisation potential is :
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Solution
The correct option is D barium
On moving down the group of alkaline earth metals, the atomic size of metals increases and their first ionization enthalpies decreases from Be to Ba. Thus non radioactive barium has least first ionization enthalpy among the non radioactive elements of group IIA.
On moving down the group of alkaline earth metals, the atomic size of metals increases and their first ionization enthalpies decreases from Be to Ba. Thus non radioactive barium has least first ionization enthalpy among the non radioactive elements of group IIA.
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