🌐EnglishEnglishBahasa IndonesiaFrançaisItalianoPortuguêsTürkçe中文日本語EntityQ7858705· pop 8· linked from 5 articlesTwo-electron atomhelium-like quantum systems that have a nucleus and two electronsAvailable in 8 languagesFrançaisPortuguêsItalianoBahasa IndonesiaGreekSerbianTürkçevia Wikidata sitelinks · CC0ConnectionslithiumEntityhydrogenEntityCategoriesAtomsQuantum models