Usage edit

Short, Long edit

Short form, Mendeleev, 1871
Long form, introduced ca. 1930
(footnote rectangle was added ca. 1940, Seaborg)

Illustrative images edit

Monument in Saint Petersburg (1932). The blue elements were added after first publication.
Hubbard's short PT (US Bureau of Standards), (1924–...)
Seaborg in his lab, Hubbard's short PT in the background (1950)


features edit

  • Te - I swap:
see also 1869. Scerri (2007) p109.