What is the ratio of AP 3+ ions to s2- ions in a neutral compound?
1:1
2:1
2:3
3:2

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.

it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

hope this : )