Oddo-Harkins rule

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English[edit]

English Wikipedia has an article on:
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Etymology[edit]

First reported by Giuseppe Oddo in 1914 and William Draper Harkins in 1917.

Proper noun[edit]

Oddo-Harkins rule

  1. (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
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