ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
出典:『Wiktionary』 (2024/09/29 22:24 UTC 版)
From eka- + actinium.
eka-actinium (uncountable)
This inconsistency, between referring to element 121 versus element 139, comes from the fact the elements beyond oganesson are not known, so it is unknown what element would be placed directly below actinium.
eka-actinium