Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two metals?

Metals react by losing electrons, and metals that lose fewer electrons generally react more readily. Rubidium is a Group 1 metal and loses one electron, while strontium is a Group 2 metal and loses two. Thus rubidium is more reactive than strontium, as choice A states. The other explanations incorrectly say that metals gain electrons or misstate how many electrons the metals lose.

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