Water molecules ionise the bare metallic surface of the liquid metal, leaving a positively charged metal surface and negatively charged water ions.
wˈɔːɾɚ mˈɑːlɪkjˌuːlz ˈaɪənˌaɪz ðə bˈɛɹ mətˈælɪk sˈɜːfɪs ʌvðə lˈɪkwɪd mˈɛɾəl, lˈiːvɪŋ ɐ pˈɑːzᵻtˌɪvli tʃˈɑːɹdʒd mˈɛɾəl sˈɜːfɪs ænd nˈɛɡətˌɪvli tʃˈɑːɹdʒd wˈɔːɾɚɹ ˈaɪɑːnz.