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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...

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Collen Von
Collen VonLv2
15 Apr 2019

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