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Physics, 14.06.2021 19:50 aaronw3743

¿CUÁNTO ES EL NÚMERO DE MASA DE UN ÁTOMO QUE TIENE 45 NEUTRONES Y 12 ELECTRONES?

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¿CUÁNTO ES EL NÚMERO DE MASA DE UN ÁTOMO QUE TIENE 45 NEUTRONES Y 12 ELECTRONES?...
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