Place the following elements in order of increasing atomic radius. Xe Rb Br
A) Br

Name: Place the following elements in order of increasing atomic radius. Xe Rb Br A) Br <Xe < Rb B) Xe< Br < Rb C) Br< Rb< Xe D) Rb< Xe < Br E) Xe < Rb< Br
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Question

Place the following elements in order of increasing atomic radius. Xe Rb Br
A) Br <Xe < Rb
B) Xe< Br < Rb
C) Br< Rb< Xe
D) Rb< Xe < Br
E) Xe < Rb< Br

Quizplus · Accepted Answer

Atomic radius increases down a group and decreases across a period. Rb is in the same group as Br but below it, so Rb has a larger radius. Xe is in the same period as Br but to the right, so Xe has a larger radius than Br. Thus, the order is Br < Xe < Rb.

Place the Following Elements in Order of Increasing Atomic Radius