# List these atoms in order of decreasing size: Br, Cl, Ge, K, S.

$\begin{array}{1 1}K > Ge > Br > S > Cl \\ Br > Ge > S > Cl > K \\ K > Br > Ge > S > Cl \\ Br > Ge > K > Cl > S \end{array}$

## 1 Answer

Answer:K > Ge > Br > S > Cl
We expect the radius of Cl to be smaller than that of Br which is in Group 7A.
S in Period 3 should be smaller than Br in Period 4.
Cl will be smaller than S, as size decreases across a period.
Of the period 4 atoms, Ge is earlier in the period than Br and therefore larger, but smaller than K which starts the period.
answered Jul 23, 2014

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