If Prout's hypothesis were true, something had to be neutralizing some of the charge of the hydrogen nuclei present in the nuclei of heavier atoms.
ɪf pɹˈaʊts haɪpˈɑːθəsˌɪs wɜː tɹˈuː, sˈʌmθɪŋ hædtə biː nˈuːtɹəlˌaɪzɪŋ sˌʌm ʌvðə tʃˈɑːɹdʒ ʌvðə hˈaɪdɹədʒən nˈuːklɪi pɹˈɛzənt ɪnðə nˈuːklɪi ʌv hˈɛviɚɹ ˈæɾəmz.