411 REFERENCE · Wiktionary
Oddo-Harkins rule
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
First reported by Giuseppe Oddo in 1914 and William Draper Harkins in 1917.
Proper noun
en chemistry a rule which states that elements that have an even number of protons in the nucleus are more common than those with an odd number
en eponyms