- Chimie
- Atomul. Nucleul. Tabelul periodic al elementelor
- Age 12-14
-
level: gimnaziu
- Romanian
คำแนะนำของผู้เขียน
exerciții stabilire grupa, perioada, configuratie electronica
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คำแนะนำของผู้เขียน
exerciții stabilire grupa, perioada, configuratie electronica