melissa857 melissa857

27-08-2020
Chemistry

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please help with the last 2.

please help with the last 2 class=

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TheChosenTwice TheChosenTwice

27-08-2020

Answer: Yttruim: 39 protons, 50 neutrons, 39 electrons

Ruthenium: 44 protons, 57 neutrons, 44 electrons

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