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@tutnyelamdeng | |
To which groups and periods do these elements belong? 1:carbon 2:neon 3:aluminium 4:potassium |
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![]() |
@tutnyelamdeng | |
To which groups and periods do these elements belong? 1:carbon 2:neon 3:aluminium 4:potassium |
||
0
Replies
38
Views
1 Bookmarks
|