🌐EnglishEnglishDeutschFrançaisItalianoPolskiРусскийالعربيةفارسی한국어中文日本語EntityQ1188332· pop 14· linked from 75 articlesnearly free electron modelphysical model of solid metals as electron gasesConnectionsionEntityquantum chemistryEntityCategoriesElectronic band structuresQuantum models