But come on, why you gotta be picky
I'm saying why you want to have pickney
Continuing with his physics/chemistry references he uses a metaphor to describe that this girls being picky.
Some basic chem here but when an atom loses or gains electrons in a chemical reaction is called an Ionic bond.
He uses the extra electron as the girl and he wants her to pick him (Cl element) and combine to make a new compound which shown below is Sodium Chloride (Salt).
To help improve the meaning of these lyrics, visit "Interlude 47" by Pro Era (Ft. Capital STEEZ, CJ Fly, Joey BADA$$ & Kirk Knight) Lyrics and leave a comment on the lyrics box