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Ranking By Ionization Energy

This worksheet covers Ranking By Ionization Energy, which is part of the Periodic Trends module in the Chemistry course. Practice problems are designed to strengthen key concepts and build confidence.

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Ranking By Ionization Energy

Periodic Trends • Chemistry

Set 2 — Foundation

Which element has the highest ionization energy among the following? $He$ , $Ne$ , $Ar$ , $Kr$

$He$

$Ne$

$Ar$

$Kr$

Which of the following elements has the lowest ionization energy? $Li$ , $Na$ , $K$ , $Rb$

$Li$

$Na$

$K$

$Rb$

Arrange the following elements in order of increasing ionization energy: $Be$ , $Mg$ , $Ca$ , $Sr$

$Be < Mg < Ca < Sr$

$Sr < Ca < Mg < Be$

$Mg < Be < Ca < Sr$

$Ca < Sr < Mg < Be$

Among the following elements, which one will require the most energy to remove an electron? $F$ , $Cl$ , $Br$ , $I$

$F$

$Cl$

$Br$

$I$

Which of the following pairs has the same ionization energy? $Na$ and $K$ , $Mg$ and $Ca$ , $P$ and $S$ , $Cl$ and $Br$

$Na$ and $K$

$Mg$ and $Ca$

$P$ and $S$

$Cl$ and $Br$

What is the general trend of ionization energy across a period? $Increase$ or $Decrease$ ?

$Increase$

$Decrease$

$Remains stable$

$Fluctuates$

Which element has a higher ionization energy, $C$ or $Si$ ?

$C$

$Si$

$They$ are the same

$Not enough information$

Which of the following elements has the second highest ionization energy? $Li$ , $Na$ , $K$ , $Be$

$Li$

$Na$

$K$

$Be$

Which of the following elements would you expect to have the highest ionization energy? $F$ , $Cl$ , $Br$ , $I$

$F$

$Cl$

$Br$

$I$

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