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OpenStudy (anonymous):

Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the largest atomic radius?

OpenStudy (anonymous):

Potassium should definitely e the largest

OpenStudy (anonymous):

http://chemwiki.ucdavis.edu/ @api/deki/files/1187/Atomic_Radius_Trend_IK.png?size=bestfit&width=650&height=350&revision=1

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