Question

Why does K have a larger atomic radius than Na?

a) K has more protons.
b) K has more neutrons.
c) K has more electron shells.
d) K has a higher atomic number.

Answer 1

K has a larger atomic radius than Na because it has more electron shells.

Step-by-step explanation:

The atomic radius of an element is determined by several factors, including the number of protons, the number of electron shells, and the charge on the ion. In the case of K (potassium) and Na (sodium), K has a larger atomic radius than Na because it has more electron shells. K (atomic number 19) has an additional electron shell compared to Na (atomic number 11), which results in a larger atomic radius for K.