Since Moseley had previously shown that the atomic number Z of an element equals this positive charge, it was now clear that Z is identical to the number of protons of its nuclei.
sˈɪns mˈoʊsli hæd pɹˈiːviəsli ʃˈoʊn ðætðɪ ɐtˈɑːmɪk nˈʌmbɚ zˈiː əvən ˈɛlɪmənt ˈiːkwəlz ðɪs pˈɑːzᵻtˌɪv tʃˈɑːɹdʒ, ɪt wʌz nˈaʊ klˈɪɹ ðæt zˈiː ɪz aɪdˈɛntɪkəl tə ðə nˈʌmbɚɹ ʌv pɹˈoʊtɑːnz ʌv ɪts nˈuːklɪi.