1. C (węgiel)
2. Si (krzem)
3. N (azot)
4. P (fosfor)
5. O (tlen)
6. Br (brom)
7. Cl (Chlor)
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1. C (węgiel)
2. Si (krzem)
3. N (azot)
4. P (fosfor)
5. O (tlen)
6. Br (brom)
7. Cl (Chlor)