Question

Which is more electropositive $Na$ or $K$ ?

Answer 1

We have to define electropositivity can be characterized as the ability of a molecule to give electrons and form positively charged cations. This property is fundamentally displayed by metallic components, particularly the alkali metals and the alkali earth metals. We can also say electropositive is the reverse of electronegativity.

Complete answer:
We have to know that the electropositivity of a component is reliant upon a few factors like the metallic character of the component, the distance between the nucleus and the valence shell, the effective nuclear charge following up on the valence electrons, and the ionization energy of the component.
The occasional patterns in the electropositivity displayed by components are consistently inverse to the intermittent patterns in the electronegativities of components. Since electronegativity increases across a period, electropositivity reduces across periods. Also, since electronegativity reduces down a group, electropositivity increases while navigating down a group. In this way, the components at the upper right of the periodic table are the most un-electropositive and the components at the base left of the periodic table are the most electropositive.
We can say that the electropositive nature of potassium is more when compared to sodium. On the off chance that we observe at the atomic number of these components the atomic number of potassium is more than sodium. In general, the electropositive feature of alkali metals rises when the atomic number additionally increases. Likewise, on the off chance that we take observations at the periodic table, the electropositive nature will in general increment down the group. So potassium is underneath sodium with a higher atomic number.
So, we can conclude that potassium is more electropositive.

Note:
We have to know that in the periodic table, the most stable electropositive element is cesium. We have to remember that the electropositive nature of elements increases when we move down the group and as we go across the period from left to right, the electropositive nature decreases.