Question

multiple - choice question
why does cs have a larger radius than rb?
because rb has 1 more electron shell than cs
because cs has 1 more electron shell than rb
because cs has more protons than rb
because cs has 1 less electron shell than rb
rewatch

Explanation:

Atomic radius generally increases with the addition of electron - shells. Cs (cesium) has a larger atomic radius than Rb (rubidium) because Cs is below Rb in the periodic table and has one more electron - shell. Protons do not account for the size difference in this case as the increase in the number of electron - shells is the dominant factor for atomic size trends down a group.

Answer:

Because Cs has 1 more electron shell than Rb