Question

Which two of the first thirty-six elements would you expect to from bond with the hreatest ionic character? Write the electronic configuration(s,p) for the ions involved?

Answer 1

Potassium Fluoride

K = `1s^2 2s^2 2p^6 3s^2 3p^6 4s^1`
Fl = `1s^2 2s^2 2p^5`

Explanation:

Well we know our bois the Alkalis (Group I) and our grills the Halogens (Group VII) love getting in on ionically, and due to the way their atoms are arranged we know that the Alkali needs to get rid of their valence electron, and the Halogen needs 1, perfect for an Ionic bond.

Group I has reactivity increase down the group as the electron has a greater effective nuclear charge from the nucleus "yanking" on it, and the opposite is true for halogens as you want that electron stuck in like glue when the reaction occurs.

Ah voila, a cheeki, and violentish reaction occurs