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PilotLPTM [1.2K]
3 years ago
10

Please help with the last 2.

Chemistry
1 answer:
ASHA 777 [7]3 years ago
3 0

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

Ruthenium: 44 protons, 57 neutrons, 44 electrons

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