Question

Why do Group 1 elements have the highest second ionization energy?

Answer 1

Answer:

When an electron is removed from the alkali metals, they form monovalent cations which have very stable configurations( same as that of noble gases). Therefore, it becomes very difficult to remove the second electron from the stable Noble gas configuration. Hence their second ionisation enthalpy values are very high.

Explanation:

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Answer 2

Answer:

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Explanation:

When an electron is removed from the alkali metals, they form monovalent cations which have very stable configurations( same as that of noble gases). Therefore, it becomes very difficult to remove the second electron from the stable Noble gas configuration. Hence their second ionisation enthalpy values are very high.