Uninzi lweempawu zee-metals zenziwa kukuba ii-atoms ezikwi-metal azibambeleli zotshele ngamandla kwii-electrons zazo. I-atom nganye yahlulwe kwezinye ngenwebu esibaca ye-valence electrons. Nangona kunjalo, ezinye ii-metals zahlukile. Umzekelo yi-metal eyisodium. Ithambile, iyanyibilika xa izinga lobushushu liphantsi liphinde futhi libe-light, fidada ngaphezulu e-manzini. kodwa mabangakuzami abantu oku, kuba enye i-property ye-sodium iyadubula wxa ikhe yadibana namanzi.