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11 Nov 2019
(a). The isotope with 18 protons and 17 neutrons is..
(b).The isotope with 7 protons and 7 neutrons is...
(c). The isotope with 17 protons and 20 neutrons is...
(d). The isotope with 19 protons and 20 neutrons is...
(a). The isotope with 18 protons and 17 neutrons is..
(b).The isotope with 7 protons and 7 neutrons is...
(c). The isotope with 17 protons and 20 neutrons is...
(d). The isotope with 19 protons and 20 neutrons is...
Collen VonLv2
15 Apr 2019