When oxygen and aluminum form an ionic compound, what is the formula? (2 points)
answer

o2al3

o3al2

a3o2

al2o3

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

b.false that your answer

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.