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Member for
3 years 4 monthsAge: 13-16
Level: 7
Language: Polish
(pl)
ID: 784231
04/03/2021
Country code: PL
Country: Poland
Main content: Atom, cząsteczka, izotopy (1300656)
Sprawdzian z działu2
Other contents: masa cząsteczkowa, protony, elektrony, neutrony
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