Sodium has a larger atomic radius than aluminum.
K
Potassium has the largest atomic radius.
chlorine. across a period the size decreases
Lithium has a larger atomic radius than hydrogen.
Atomic radius increases going down the periodic table and going from right to left, meaning that Fr (Francium) has the largest atomic radius and He (Helium) has the smallest. Therefore, Cl<S<P<Si<Al So the answer is Cl
K
Potassium has the largest atomic radius.
The neutral atom of potassium has the largest radius.
NA
Sodium
Look at your periodic table and you will see that K, potassium, must have the largest radius of these choices. You know that, K + and Na + will be small in radius because they have donated an electron to become positively charged cations.
Ti
Postassium, K, has a larger radius than sodium, Na, because it is in the next period on the table but in the same group as sodium.
chlorine. across a period the size decreases
Rb is the largest, Li the smallest in the row above. Group 1 of the periodic table: Fr > Cs > Rb > K > Na > Li > H
From the given elements, potassium has the largest atomic radius.
Na+ is smaller than Na.