If the name of a compound ends in "IDE", what does that tell us about the atoms that make it up?Immersive Reader That it is a molecule

That it contains two different elements

That it contains two atoms

That it is an ionic compound

a electronegativity decreases beacuse the size of nucleus is bigger.

um i think it might be a car?

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.