ɐn ˈoʊld aɪdˈiə kˈɔːld pɹˈaʊts haɪpˈɑːθəsˌɪs hæd pˈɔstʃʊlˌeɪɾᵻd ðætðɪ ˈɛlɪmənts wɜːɹ ˈɔːl mˌeɪd ʌv ɹˈɛsɪdˌuːz ɔːɹ "pɹˈɑːɾɪlz"ʌvðə lˈaɪɾɪst ˈɛlɪmənt hˈaɪdɹədʒən, wˌɪtʃ ɪnðə bˈoʊɚɹˈʌðɚfɚd mˈɑːdəl hæd ɐ sˈɪŋɡəl ᵻlˈɛktɹɑːn ænd ɐ nˈuːklɪɹ tʃˈɑːɹdʒ ʌv wˌʌn.
An old idea called Prout's hypothesis had postulated that the elements were all made of residues (or "protyles") of the lightest element hydrogen, which in the Bohr-Rutherford model had a single electron and a nuclear charge of one.