Que sucedio despues de que la union astronomica define lo que era un planeta porfavor ayudenme es para hoy

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer for sodium is 0.186

the answer for rubidium is 0.251

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).