最終更新日：2025/11/19
Mendeleev speculated about tri-silicon as the hypothetical element that would lie three periods below silicon on a Mendeleev-type periodic table.
正解を見る
Mendeleev speculated about tri-silicon as the hypothetical element that would lie three periods below silicon on a Mendeleev-type periodic table.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
