- ķīmija
- Atoma sastāvs
- Edad 14-15
-
level: 8.klasei
- Latvian
Instrucciones del autor
protoni, elektroni, neitroni, atommasas, kodola lādiņš
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Instrucciones del autor
protoni, elektroni, neitroni, atommasas, kodola lādiņš