In addition to the case of iodine and tellurium, several other pairs of elements (such as argon and potassium, cobalt and nickel) were later shown to have nearly identical or reversed atomic weights, thus requiring their placement in the periodic table to be determined by their chemical properties.
ɪn ɐdˈɪʃən tə ðə kˈeɪs ʌv ˈaɪədˌiːn ænd tɛlˈʊɹɹiəm, sˈɛvɹəl ˈʌðɚ pˈɛɹz ʌv ˈɛlɪmənts sˈʌtʃ ɐz ˈɑːɹɡɑːn ænd pətˈæsiəm, kˈoʊbɔlt ænd nˈɪkəl wɜː lˈeɪɾɚ ʃˈoʊn tə hæv nˌɪɹli aɪdˈɛntɪkəl ɔːɹ ɹᵻvˈɜːst ɐtˈɑːmɪk wˈeɪts, ðˈʌs ɹᵻkwˈaɪɚɹɪŋ ðɛɹ plˈeɪsmənt ɪnðə pˌiəɹɪˈɑːdɪk tˈeɪbəl təbi dɪtˈɜːmɪnd baɪ ðɛɹ kˈɛmɪkəl pɹˈɑːpɚɾiz.