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OpenStudy (anonymous):
A student thinks that the more protons an atom has, the more reactive it will be. Which will best disprove this student's idea? Compare the reactivities of lithium (Li) and krypton (Kr). Note that rubidium has 48 neutrons. Compare the number of protons in cesium (Ce) and xenon (Xe). Count the number of neutrons in an atom of helium.
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