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Wartościowość
| Question | Answer |
|---|---|
| O | II |
| gr 1 | I |
| gr 2 | II |
| gr 13 | III |
| Zn | II |
| Cu | I oraz II |
| Fe | II lub III |
| C | II, IV |
| S | II, IV lub VI |
| N | I, II, III, IV, lub V |
| Cl | I, II, V, lub VII |
| Cl w chlorkach | I |
| S w siarczkach | II |
| Cr | II, III, IV |
| Sn | II, IV |
| Hg | I, II |
| Si | IV |
| Ag | I |
| Pb | II, IV |
| Al | III |
| Au | I, II, III |