105, p. 230) Harkins and Broeker reported that they had obtained a partial separation of the element chlorine into isotopes. Five determinations made early in February of that year showed atomic ...

The terms "heavy" and "light" refer to versions of the chlorine atom, known as isotopes, that contain different numbers of neutrons in their nuclei. Related: How the moon formed: 5 wild lunar ...

The different types of chlorine are called isotopes of chlorine. Key fact Isotopes are forms of an element that have the same number of protons but different numbers of neutrons. There are three ...