Someone plz help for a brainliest

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

If y gets smaller as x gets bigger and y have an relationship?

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?