What scientist design an experiment that enabled the first successful detection of an individual particle

The appropriate response would be British physicist, Sir Joseph John Thomson OM PRS. He was an English physicist and Nobel Laureate in Physics, credited with the disclosure and known of the electron; and with the revelation of the main subatomic particle.

Ifound this on google “these two compounds have a different ionic structure. caesium ion is larger in size when compared to the sodium ion. the charge gets more area to spread out evenly. so caesium chloride has a lower melting point than sodium chloride.” i hope this you for what your looking for

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now