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Ranking By Radius Size

This worksheet covers Ranking By Radius Size, 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 Radius Size

Periodic Trends • Chemistry

Set 5 — Mastery

Which ion has the smallest radius?

$Li^{+}$

$Na^{+}$

$K^{+}$

$Rb^{+}$

Arrange the following elements in order of increasing atomic radius: $Cl$ , $S$ , $P$ .

$Cl < S < P$

$P < S < Cl$

$S < P < Cl$

$S < Cl < P$

Which of the following elements has the largest atomic radius?

$Ca$

$Sr$

$Ba$

$Ra$

Which of the following ions would have the largest radius?

$Cl^{-}$

$Br^{-}$

$I^{-}$

$F^{-}$

Rank the following elements in order of decreasing radius: $N$ , $O$ , $F$ .

$N > O > F$

$F > O > N$

$O > N > F$

$O > F > N$

Which of the following pairs of ions has the same electron configuration but different radii?

$N^{3-}, O^{2-}$

$Na^{+}, Mg^{2+}$

$Cl^{-}, Ar$

$K^{+}, Ca^{2+}$

Which element has the smallest atomic radius in the following group: $Li$ , $Na$ , $K$ ?

$Li$

$Na$

$K$

$Rb$

How does the atomic radius of $C$ compare to that of $Si$ ?

$C < Si$

$C > Si$

$C = Si$

$C$ has no radius.

Which of the following has the largest ionic radius?

$Ca^{2+}$

$Na^{+}$

$K^{+}$

$Cl^{-}$

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