Rubidium (Rb)

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Practice rubidium

Questions from the course about rubidium. If you’re signed in, your answers count toward your progress.

1. Question 1Compare two elements and explainExam level

   Which element has the larger atomic radius, $\ce{Rb}$ or $\ce{Sr}$, and why?

   ASr: it has more electrons, and more electrons take up more space.BSr: its greater effective nuclear charge spreads the electron cloud out.CRb: its valence electrons (same shell, n = 5) feel a smaller effective nuclear charge, so they are held less tightly.DRb: it has more occupied electron shells.

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