Guys pls help me with this question it due today Pls pls help me

When a septic tank backs up a goes in to clean it out

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules