HERO TRAINING
SLIDE 1 OF 16
ASSIGN EVERY ELEMENT
water
ASSIGN EVERY ELEMENT
water
ROUND COMPLETE
Keep building those redox reflexes.
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QUICK REFERENCE
| Atom or ion | Oxidation number | Examples |
|---|---|---|
| all atoms in elements | 0 | Na is 0 Cl in Cl2 is 0 |
| hydrogen in all compounds, except hydrogen in hydrides |
+1 −1 |
H in HCl is +1 H in LiH is −1 |
| oxygen in all compounds, except oxygen in peroxides |
−2 −1 |
O in H2O is −2 O in H2O2 is −1 |
| all monatomic ions | charge on ion | Na+ is +1 S2− is −2 |