Why gallium has high ionisation enthalphy than aluminium
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such as is aluminium have high reactivity of metals.some metals have less reactivity like iron.. I think this is correct answer. if is wrong don't sclod me
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Due to ineffective shielding of valence electrons by the intervening 3d electrons, the effective nuclear charge on Ga is slightly higher than that on A1 and hence the ΔHi of gallium is slightly higher than that of Al. Boron has three electrons in the valence shell. Because of its small size and high sum of the first three ionisation enthalpies.
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