Full Idea
Moseley's work showed that the successive elements in the periodic table have an atomic number greater by one unit. The gaps could then be identified definitively, as 43, 61, 72, 75, 85, 87, and 91.
Gist of Idea
Moseley showed the elements progress in units, and thereby clearly identified the gaps
Source
Eric R. Scerri (The Periodic Table [2007], 06 'Henry')
Book Reference
Scerri,Eric R.: 'The Periodic Table' [OUP 2007], p.173
A Reaction
[compressed]
Related Ideas
Idea 17406 Moseley, using X-rays, showed that atomic number ordered better than atomic weight [Scerri]
Idea 17411 If all elements are multiples of one (of hydrogen), that suggests once again that matter is unified [Scerri]
Idea 13575 If there are borderline cases between natural kinds, that makes them superficial [Ellis]
Idea 16750 If there are just arrangements of corpuscles, where are the boundaries between substances? [Pasnau]