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Member for
3 years 6 monthsAge: 14+
Level: 11mo
Language: Spanish
(es)
ID: 458362
30/10/2020
Country code: PR
Country: Puerto Rico
Main content: Isótopos (1985288)
¿Isótopos o diferentes elementos?
Other contents: protones, neutrones, masa atómica, número atómico, electrones
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