Birtan bir-atoon ah ayaa laga heli karaa qaabab kala duwan sida biilasha, gascaata, taarikada fidsan, taarikada jeebka, iwm. Stels-yadaan ayaa sidoo kale ku habboon adeegsiga kiimikada sida zittonium, tatnium, aluminium, nitrogan, boron, paron, nickel iyo nitrogen iyo nitrogen.