The heavier alkali metals, however, are more typically isolated in a different way, where a reducing agent (typically sodium for potassium and magnesium or calcium for the heaviest alkali metals) is used to reduce the alkali metal chloride.
ðə hˈɛviɚɹ ˈælkəlˌaɪ mˈɛɾəlz, haʊˈɛvɚ, ɑːɹ mˈoːɹ tˈɪpɪkli ˈaɪsəlˌeɪɾᵻd ɪn ɐ dˈɪfɹənt wˈeɪ, wˌɛɹ ɐ ɹᵻdˈuːsɪŋ ˈeɪdʒənt tˈɪpɪkli sˈoʊdiəm fɔːɹ pətˈæsiəm ænd mæɡnˈiːziəm ɔːɹ kˈælsiəm fɚðə hˈɛviɪst ˈælkəlˌaɪ mˈɛɾəlz ɪz jˈuːzd tə ɹᵻdˈuːs ðɪ ˈælkəlˌaɪ mˈɛɾəl klˈoːɹaɪd.