Metal alkalen
Apparence
Metal alkalen se yon gwoup eleman 1A elements, sof pou idwojèn, ki sou kote gòch tablo peryodik modèn nan.[1]
Referans
[modifye | modifye kòd]- ↑ « Kopi achiv » (PDF). Archived from the original (PDF) on 2011-07-28. Retrieved 2010-06-10.