Atomic number of which of the following elements is greater than that of Potassium?

The atomic numbers of the given elements are as follows:Sulphur ($\text{S}$): $16$ Chlorine ($\text{Cl}$): $17$ Argon ($\text{Ar}$): $18$ Potassium ($\text{K}$): $19$ Calcium ($\text{Ca}$): $20$ Thus, the atomic number of Calcium ($20$) is greater than that of Potassium ($19$).