Question

Give the trend of ionization energy across the period and down the group

Answer 1

Across a period, Zeff increases and n (principal quantum number) remains the same, so the ionization energy increases. Down a group, n increases and Zeff increases slightly; the ionization energy decreases...

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Answer 2

Answer:Ionization energy increases from left to right in a period because numbers of electrons increase along the period.The increase in electrons means that the increase in interaction between nucleus and outermost shell.so,it is difficult to remove electron from outermost shell.

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Explanation: