Explain The 1st ionization enthalpies of alkali and alkaline earth metals are generally low. However ionization enthalpies of2A group elements are higher than 1A group elements.
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The s-Block Elements. The first ionisation enthalpies of alkaline earth metals are higher than those of corresponding alkali metals. ... Therefore, the electrons in the outermost shells of the alkaline earth metals are more tightly held. As a result, the ionisation enthalpies are higher than those of alkali metals.
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