Francis William Aston

“We must not be too surprised if some of these are returned to us from the moon in the form of meteors.”

“The first definite proof of the reality of isotopes of stable elements was afforded by the element neon.”

“What is true of the atomic weight of chlorine is true of many of the other elements.”

“Personally, I think there is not a scrap of evidence that the process of isotopic separation can be made to produce explosive bombs.”

“Not even a rumour of a particle of electricity had reached the ear of the chemist.”

“If we have a positively charged mass m, and it is moving with a velocity v, it constitutes an electric current.”