Smallest to largest is going down the group 1. I.e. Li is smallest<Rb<Cs
Rb (rubidium) is the largest element among K (potassium), Rb (rubidium), Na (sodium), and Li (lithium). This is because as you move down a group in the periodic table, the atomic size increases due to the addition of more electron shells.
Rb > K > Na > Li. The order based on atomic size is Rb > K > Na > Li. Therefore, the size of the circles should reflect this order from largest to smallest.
Rb
H Li Na K Rb Cs Fr
The alkali metals are: Li, Na, K, Rb, Cs, Fr.
group 1 is Li, Na, K, Rb, Cs and Fr.
Li Na K Rb Cs Fr (hope this is help)
Group 1 Li, Na, K, Rb, Cs, Fr
Li+,Na+,K+,Rb+,Cs+,Fr+
The alkali metals family contain Li, Na, K, Rb, Cs and Fr.
H Li Na K Rb Cs
Rb (Rubidium) is the largest element among Li, Na, Rb, and K as you move down the same group or in the same period from left to right on the periodic table.