Adapted from an image by Cardiocerascordatum (CC BY-SA 4.0), via Wikimedia Commons. This version is shared under the same licence.
1849–1932
Charles Janet
Drew the left-step periodic table in 1928, ordering the elements by how their electron shells fill.
Their table
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Where the dates and stories on this page come from; each event on the timeline links to its own source.
- Charles JanetWikipedia