Place the following elements in order of decreasing atomic radius. Cd Rb Xe Rb > Cd > Xe Xe > Cd > Rb Cd > Rb > Xe Rb > Xe > Cd Xe > Rb > Cd
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Rb (Rubidium) is in the 5th period, Group 1. Cd (Cadmium) is in the 5th period, Group 12. Xe (Xenon) is in the 5th period, Group 18. Since they are all in the same period, we can use the rule that atomic radius decreases from left to right. Show more…
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